Comparador

Tracking since Apr 4, 2026.

Changelog

• Apr 23, 2026
  description

  Comparador is a tool for on-demand visual regression testing — compare web pages across environments, track changes over time, debug deployment issues.
  
  Easy: Install → Capture → Compare.
  
  No pipelines. No accounts. No external servers.
  
  Key features:
  📸 Visual Diff: Full-page screenshots with pixel-level comparison, mismatch %, multiple view modes
  📄 HTML Diff: Side-by-side source comparison with syntax highlighting
  📋 Headers Diff: Compare response headers (cache, CDN, security)
  🪵 Logs Diff: Compare console logs — spot new errors, warnings, count changes
  📊 Metrics Diff: Track 20 performance indicators (TTFB, DOM load, JS heap) with threshold-based verdicts
  ✅ Baselines: Accept/reject workflow with automatic + manual baseline control
  🔄 Auto Compare: Automatic comparison against baselines after capture with auto-accept
  🚀 Batch Capture: Capture projects or groups of URLs, compare across environments
  ⚡ Popup: Quick environment switching + fast access to frequently tested pages
  
  Changelog:
  
  1.3.4
  
  · Faster diff view — new fast engine is now the default for HTML and headers diffs, dramatically improving rendering speed; rich engine available as an experimental alternative for character-level highlighting
  · Syntax highlighting for headers diff — HTTP response headers now have color-coded header names and values in the diff view
  · Searchable compare selectors — capture and attempt dropdowns now include a search input with contextual hints for quick filtering
  · Upgraded core UI framework and dependencies
  · Bug fixes, performance improvements, and UI polish
  
  1.3.1
  
  · Compare baseline with previous — when the latest capture is already the baseline, compare automatically diffs it against the prior version
  · Eager loading — page script strips loading="lazy" before scrolling to prevent cancelled fetches in background tabs (prepare.eager, on by default)
  · Unified comparison logic across all compare buttons
  · Bug fixes and stability improvements
  
  1.3.0
  
  · Logs diff — five diff tabs now: screenshots, HTML, headers, console logs, and performance metrics. Logs are grouped by message and severity — see new errors appear, old ones vanish, or counts shift
  · Metrics diff — track 20 performance indicators (TTFB, DOM load, JS heap, resources, layout) with threshold-based verdicts, worsened-only mode, smart defaults for volatile metrics, and configurable per-metric thresholds
  · Per-type verdict control — include or exclude any diff tab from the overall verdict independently — disable noisy channels without losing visibility
  · Diff tab severity indicators — tab icons are color-coded by diff severity so you instantly see which data types have changes
  · Smarter compare filters — improved identical/differences/all filter logic with automatic filter and tab switching based on resolved verdicts
  · Compare script for all types — the compare script now normalizes all four text-based data types: HTML, headers, logs, and metrics — with consistent ignore patterns supporting exact strings and regex objects
  · Restructured compare variables — compare section uses clean subkeys (html, headers, logs, metrics) for all diff types
  · JSON5 validation — variables editor validates syntax in real time with inline error markers
  · Comparison data stored separately from metadata for faster list views
  
  1.2.1
   
  ・Automatic comparison — every capture is instantly diffed against its baseline across screenshots, HTML, and headers with configurable thresholds
  ・Auto-accept — identical captures are auto-accepted and cascade up, so you only review what actually changed
  ・Screenshot masks — mask dynamic page regions (ads, carousels, timestamps) by CSS selector —masked areas get a checkerboard overlay in screenshots and their markup is stripped from diffs
  ・Compare script — normalize away noise before diffing: strip analytics, CDN tokens, dynamic selectors, headers — with regex patterns and script filters
  ・Compare script tester — test normalization scripts inline from project settings with live diff preview
  ・Comparison badges — see diff status at a glance on every capture and attempt
  ・Compare filters — filter URL pairs by differences or identical in capture comparison view, with auto-switch to differences when verdicts resolve
  ・Review page — filter by status, bulk accept/reject across captures
  ・Post-capture actions — View, Compare (pre-filtered to differences), and Review buttons after capture completes
  ・Smart script context — page and compare scripts receive auto-upgrading defaults and per-project variables
  ・Configurable page readiness — choose when to capture: on load, network almost idle, or full network idle
  ・Per-project parallel capture — configurable parallel capture concurrency per project
  ・Capture hardening — tab-based capture eliminates the window flash on Windows
  ・Auto-switch to first diff tab with changes when navigating between URL pairs
  ・Clear with baseline preservation, database wipe & storage stats
  ・Switched from Monaco Editor to CodeMirror for a lighter bundle and snappier diffs
  ・Updated help with a new Automation chapter covering all five scripts and variables
  ・Compressed backups — smaller export files, faster backup & restore
  ・Hardened backup & restore — large file support, interactive modals with progress tracking, tab-close prevention
  ・Faster navigation in comparison views due to optimized data loading and rendering
  ・Bug fixes and stability improvements
  
  1.1.0
  
  • Baseline & review workflow — accept/reject captures and individual URLs, automatic + manual baseline pinning
  • Review page — dedicated view for reviewing pending captures with progress tracking
  • Built-in help — documentation with diagrams, covering all features
  • Dashboard with pending review shortcuts
  • Deletion protection for capture-bound attempts
  • Dependency updates and bug fixes
  
  1.0.2
  
  • Database backup & restore
  • Quick capture buttons on project/group lists
  • Compare buttons to diff last 2 attempts/captures
  • Enhanced attempt view with dropdown actions
  • Improved stability when switching/deleting projects
  • UI polish and bug fixes
  
  1.0.1
  
  • Initial release

  Comparador is a tool for on-demand visual regression testing — compare web pages across environments, track changes over time, debug deployment issues.
  
  Easy: Install → Capture → Compare.
  
  No pipelines. No accounts. No external servers.
  
  Key features:
  📸 Visual Diff: Full-page screenshots with pixel-level comparison, mismatch %, multiple view modes
  📄 HTML Diff: Side-by-side source comparison with syntax highlighting
  📋 Headers Diff: Compare response headers (cache, CDN, security)
  🪵 Logs Diff: Compare console logs — spot new errors, warnings, count changes
  📊 Metrics Diff: Track 20 performance indicators (TTFB, DOM load, JS heap) with threshold-based verdicts
  ✅ Baselines: Accept/reject workflow with automatic + manual baseline control
  🔄 Auto Compare: Automatic comparison against baselines after capture with auto-accept
  🚀 Batch Capture: Capture projects or groups of URLs, compare across environments
  ⚡ Popup: Quick environment switching + fast access to frequently tested pages
  
  Changelog:
  
  1.3.5
  
  · Context-gated review — accept/reject buttons only appear when the current entity is newer than the baseline, preventing accidental review of historical data
  · State reason tracking — auto-accepted items now show why they were accepted (first capture, identical content, or promoted), visible in badge tooltips
  · Smarter capture thumbnails — preview attempts follow URL display order with baseline-aware fallback
  · WCAG AA themed colors — light and dark themes use separate color palettes, each verified for ≥4.5:1 contrast ratio
  · Faster state-based filtering in review queries
  · Bug fixes, performance improvements, and UI polish
  
  1.3.4
  
  · Faster diff view — new fast engine is now the default for HTML and headers diffs, dramatically improving rendering speed; rich engine available as an experimental alternative for character-level highlighting
  · Syntax highlighting for headers diff — HTTP response headers now have color-coded header names and values in the diff view
  · Searchable compare selectors — capture and attempt dropdowns now include a search input with contextual hints for quick filtering
  · Upgraded core UI framework and dependencies
  · Bug fixes, performance improvements, and UI polish
  
  1.3.1
  
  · Compare baseline with previous — when the latest capture is already the baseline, compare automatically diffs it against the prior version
  · Eager loading — page script strips loading="lazy" before scrolling to prevent cancelled fetches in background tabs (prepare.eager, on by default)
  · Unified comparison logic across all compare buttons
  · Bug fixes and stability improvements
  
  1.3.0
  
  · Logs diff — five diff tabs now: screenshots, HTML, headers, console logs, and performance metrics. Logs are grouped by message and severity — see new errors appear, old ones vanish, or counts shift
  · Metrics diff — track 20 performance indicators (TTFB, DOM load, JS heap, resources, layout) with threshold-based verdicts, worsened-only mode, smart defaults for volatile metrics, and configurable per-metric thresholds
  · Per-type verdict control — include or exclude any diff tab from the overall verdict independently — disable noisy channels without losing visibility
  · Diff tab severity indicators — tab icons are color-coded by diff severity so you instantly see which data types have changes
  · Smarter compare filters — improved identical/differences/all filter logic with automatic filter and tab switching based on resolved verdicts
  · Compare script for all types — the compare script now normalizes all four text-based data types: HTML, headers, logs, and metrics — with consistent ignore patterns supporting exact strings and regex objects
  · Restructured compare variables — compare section uses clean subkeys (html, headers, logs, metrics) for all diff types
  · JSON5 validation — variables editor validates syntax in real time with inline error markers
  · Comparison data stored separately from metadata for faster list views
  
  1.2.1
   
  ・Automatic comparison — every capture is instantly diffed against its baseline across screenshots, HTML, and headers with configurable thresholds
  ・Auto-accept — identical captures are auto-accepted and cascade up, so you only review what actually changed
  ・Screenshot masks — mask dynamic page regions (ads, carousels, timestamps) by CSS selector —masked areas get a checkerboard overlay in screenshots and their markup is stripped from diffs
  ・Compare script — normalize away noise before diffing: strip analytics, CDN tokens, dynamic selectors, headers — with regex patterns and script filters
  ・Compare script tester — test normalization scripts inline from project settings with live diff preview
  ・Comparison badges — see diff status at a glance on every capture and attempt
  ・Compare filters — filter URL pairs by differences or identical in capture comparison view, with auto-switch to differences when verdicts resolve
  ・Review page — filter by status, bulk accept/reject across captures
  ・Post-capture actions — View, Compare (pre-filtered to differences), and Review buttons after capture completes
  ・Smart script context — page and compare scripts receive auto-upgrading defaults and per-project variables
  ・Configurable page readiness — choose when to capture: on load, network almost idle, or full network idle
  ・Per-project parallel capture — configurable parallel capture concurrency per project
  ・Capture hardening — tab-based capture eliminates the window flash on Windows
  ・Auto-switch to first diff tab with changes when navigating between URL pairs
  ・Clear with baseline preservation, database wipe & storage stats
  ・Switched from Monaco Editor to CodeMirror for a lighter bundle and snappier diffs
  ・Updated help with a new Automation chapter covering all five scripts and variables
  ・Compressed backups — smaller export files, faster backup & restore
  ・Hardened backup & restore — large file support, interactive modals with progress tracking, tab-close prevention
  ・Faster navigation in comparison views due to optimized data loading and rendering
  ・Bug fixes and stability improvements
  
  1.1.0
  
  • Baseline & review workflow — accept/reject captures and individual URLs, automatic + manual baseline pinning
  • Review page — dedicated view for reviewing pending captures with progress tracking
  • Built-in help — documentation with diagrams, covering all features
  • Dashboard with pending review shortcuts
  • Deletion protection for capture-bound attempts
  • Dependency updates and bug fixes
  
  1.0.2
  
  • Database backup & restore
  • Quick capture buttons on project/group lists
  • Compare buttons to diff last 2 attempts/captures
  • Enhanced attempt view with dropdown actions
  • Improved stability when switching/deleting projects
  • UI polish and bug fixes
  
  1.0.1
  
  • Initial release

• Apr 17, 2026
  description

  Comparador is a tool for on-demand visual regression testing — compare web pages across environments, track changes over time, debug deployment issues.
  
  Easy: Install → Capture → Compare.
  
  No pipelines. No accounts. No external servers.
  
  Key features:
  📸 Visual Diff: Full-page screenshots with pixel-level comparison, mismatch %, multiple view modes
  📄 HTML Diff: Side-by-side source comparison with syntax highlighting
  📋 Headers Diff: Compare response headers (cache, CDN, security)
  ✅ Baselines: Accept/reject workflow with automatic + manual baseline control
  🚀 Batch Capture: Capture projects or groups of URLs, compare across environments
  ⚡ Popup: Quick environment switching + fast access to frequently tested pages
  
  Changelog:
  
  1.2.1
   
  ・Automatic comparison — every capture is instantly diffed against its baseline across screenshots, HTML, and headers with configurable thresholds
  ・Auto-accept — identical captures are auto-accepted and cascade up, so you only review what actually changed
  ・Screenshot masks — mask dynamic page regions (ads, carousels, timestamps) by CSS selector —masked areas get a checkerboard overlay in screenshots and their markup is stripped from diffs
  ・Compare script — normalize away noise before diffing: strip analytics, CDN tokens, dynamic selectors, headers — with regex patterns and script filters
  ・Compare script tester — test normalization scripts inline from project settings with live diff preview
  ・Comparison badges — see diff status at a glance on every capture and attempt
  ・Compare filters — filter URL pairs by differences or identical in capture comparison view, with auto-switch to differences when verdicts resolve
  ・Review page — filter by status, bulk accept/reject across captures
  ・Post-capture actions — View, Compare (pre-filtered to differences), and Review buttons after capture completes
  ・Smart script context — page and compare scripts receive auto-upgrading defaults and per-project variables
  ・Configurable page readiness — choose when to capture: on load, network almost idle, or full network idle
  ・Per-project parallel capture — configurable parallel capture concurrency per project
  ・Capture hardening — tab-based capture eliminates the window flash on Windows
  ・Auto-switch to first diff tab with changes when navigating between URL pairs
  ・Clear with baseline preservation, database wipe & storage stats
  ・Switched from Monaco Editor to CodeMirror for a lighter bundle and snappier diffs
  ・Updated help with a new Automation chapter covering all five scripts and variables
  ・Compressed backups — smaller export files, faster backup & restore
  ・Hardened backup & restore — large file support, interactive modals with progress tracking, tab-close prevention
  ・Faster navigation in comparison views due to optimized data loading and rendering
  ・Bug fixes and stability improvements
  
  1.1.0
  
  • Baseline & review workflow — accept/reject captures and individual URLs, automatic + manual baseline pinning
  • Review page — dedicated view for reviewing pending captures with progress tracking
  • Built-in help — documentation with diagrams, covering all features
  • Dashboard with pending review shortcuts
  • Deletion protection for capture-bound attempts
  • Dependency updates and bug fixes
  
  1.0.2
  
  • Database backup & restore
  • Quick capture buttons on project/group lists
  • Compare buttons to diff last 2 attempts/captures
  • Enhanced attempt view with dropdown actions
  • Improved stability when switching/deleting projects
  • UI polish and bug fixes
  
  1.0.1
  
  • Initial release

  Comparador is a tool for on-demand visual regression testing — compare web pages across environments, track changes over time, debug deployment issues.
  
  Easy: Install → Capture → Compare.
  
  No pipelines. No accounts. No external servers.
  
  Key features:
  📸 Visual Diff: Full-page screenshots with pixel-level comparison, mismatch %, multiple view modes
  📄 HTML Diff: Side-by-side source comparison with syntax highlighting
  📋 Headers Diff: Compare response headers (cache, CDN, security)
  🪵 Logs Diff: Compare console logs — spot new errors, warnings, count changes
  📊 Metrics Diff: Track 20 performance indicators (TTFB, DOM load, JS heap) with threshold-based verdicts
  ✅ Baselines: Accept/reject workflow with automatic + manual baseline control
  🔄 Auto Compare: Automatic comparison against baselines after capture with auto-accept
  🚀 Batch Capture: Capture projects or groups of URLs, compare across environments
  ⚡ Popup: Quick environment switching + fast access to frequently tested pages
  
  Changelog:
  
  1.3.4
  
  · Faster diff view — new fast engine is now the default for HTML and headers diffs, dramatically improving rendering speed; rich engine available as an experimental alternative for character-level highlighting
  · Syntax highlighting for headers diff — HTTP response headers now have color-coded header names and values in the diff view
  · Searchable compare selectors — capture and attempt dropdowns now include a search input with contextual hints for quick filtering
  · Upgraded core UI framework and dependencies
  · Bug fixes, performance improvements, and UI polish
  
  1.3.1
  
  · Compare baseline with previous — when the latest capture is already the baseline, compare automatically diffs it against the prior version
  · Eager loading — page script strips loading="lazy" before scrolling to prevent cancelled fetches in background tabs (prepare.eager, on by default)
  · Unified comparison logic across all compare buttons
  · Bug fixes and stability improvements
  
  1.3.0
  
  · Logs diff — five diff tabs now: screenshots, HTML, headers, console logs, and performance metrics. Logs are grouped by message and severity — see new errors appear, old ones vanish, or counts shift
  · Metrics diff — track 20 performance indicators (TTFB, DOM load, JS heap, resources, layout) with threshold-based verdicts, worsened-only mode, smart defaults for volatile metrics, and configurable per-metric thresholds
  · Per-type verdict control — include or exclude any diff tab from the overall verdict independently — disable noisy channels without losing visibility
  · Diff tab severity indicators — tab icons are color-coded by diff severity so you instantly see which data types have changes
  · Smarter compare filters — improved identical/differences/all filter logic with automatic filter and tab switching based on resolved verdicts
  · Compare script for all types — the compare script now normalizes all four text-based data types: HTML, headers, logs, and metrics — with consistent ignore patterns supporting exact strings and regex objects
  · Restructured compare variables — compare section uses clean subkeys (html, headers, logs, metrics) for all diff types
  · JSON5 validation — variables editor validates syntax in real time with inline error markers
  · Comparison data stored separately from metadata for faster list views
  
  1.2.1
   
  ・Automatic comparison — every capture is instantly diffed against its baseline across screenshots, HTML, and headers with configurable thresholds
  ・Auto-accept — identical captures are auto-accepted and cascade up, so you only review what actually changed
  ・Screenshot masks — mask dynamic page regions (ads, carousels, timestamps) by CSS selector —masked areas get a checkerboard overlay in screenshots and their markup is stripped from diffs
  ・Compare script — normalize away noise before diffing: strip analytics, CDN tokens, dynamic selectors, headers — with regex patterns and script filters
  ・Compare script tester — test normalization scripts inline from project settings with live diff preview
  ・Comparison badges — see diff status at a glance on every capture and attempt
  ・Compare filters — filter URL pairs by differences or identical in capture comparison view, with auto-switch to differences when verdicts resolve
  ・Review page — filter by status, bulk accept/reject across captures
  ・Post-capture actions — View, Compare (pre-filtered to differences), and Review buttons after capture completes
  ・Smart script context — page and compare scripts receive auto-upgrading defaults and per-project variables
  ・Configurable page readiness — choose when to capture: on load, network almost idle, or full network idle
  ・Per-project parallel capture — configurable parallel capture concurrency per project
  ・Capture hardening — tab-based capture eliminates the window flash on Windows
  ・Auto-switch to first diff tab with changes when navigating between URL pairs
  ・Clear with baseline preservation, database wipe & storage stats
  ・Switched from Monaco Editor to CodeMirror for a lighter bundle and snappier diffs
  ・Updated help with a new Automation chapter covering all five scripts and variables
  ・Compressed backups — smaller export files, faster backup & restore
  ・Hardened backup & restore — large file support, interactive modals with progress tracking, tab-close prevention
  ・Faster navigation in comparison views due to optimized data loading and rendering
  ・Bug fixes and stability improvements
  
  1.1.0
  
  • Baseline & review workflow — accept/reject captures and individual URLs, automatic + manual baseline pinning
  • Review page — dedicated view for reviewing pending captures with progress tracking
  • Built-in help — documentation with diagrams, covering all features
  • Dashboard with pending review shortcuts
  • Deletion protection for capture-bound attempts
  • Dependency updates and bug fixes
  
  1.0.2
  
  • Database backup & restore
  • Quick capture buttons on project/group lists
  • Compare buttons to diff last 2 attempts/captures
  • Enhanced attempt view with dropdown actions
  • Improved stability when switching/deleting projects
  • UI polish and bug fixes
  
  1.0.1
  
  • Initial release

• Apr 4, 2026
  description

  Comparador is a tool for on-demand visual regression testing — compare web pages across environments, track changes over time, debug deployment issues.
  
  Easy: Install → Capture → Compare.
  
  No pipelines. No accounts. No external servers.
  
  Key features:
  📸 Visual Diff: Full-page screenshots with pixel-level comparison, mismatch %, multiple view modes
  📄 HTML Diff: Side-by-side source comparison with syntax highlighting
  📋 Headers Diff: Compare response headers (cache, CDN, security)
  ✅ Baselines: Accept/reject workflow with automatic + manual baseline control
  🚀 Batch Capture: Capture projects or groups of URLs, compare across environments
  ⚡ Popup: Quick environment switching + fast access to frequently tested pages
  
  Changelog:
  
  1.1.0 – Baselines & review:
  
  • Baseline & review workflow — accept/reject captures and individual URLs, automatic + manual baseline pinning
  • Review page — dedicated view for reviewing pending captures with progress tracking
  • Built-in help — documentation with diagrams, covering all features
  • Dashboard with pending review shortcuts
  • Deletion protection for capture-bound attempts
  • Dependency updates and bug fixes
  
  1.0.2 – Improvements:
  
  • Database backup & restore
  • Quick capture buttons on project/group lists
  • Compare buttons to diff last 2 attempts/captures
  • Enhanced attempt view with dropdown actions
  • Improved stability when switching/deleting projects
  • UI polish and bug fixes
  
  1.0.1 – Initial release

  Comparador is a tool for on-demand visual regression testing — compare web pages across environments, track changes over time, debug deployment issues.
  
  Easy: Install → Capture → Compare.
  
  No pipelines. No accounts. No external servers.
  
  Key features:
  📸 Visual Diff: Full-page screenshots with pixel-level comparison, mismatch %, multiple view modes
  📄 HTML Diff: Side-by-side source comparison with syntax highlighting
  📋 Headers Diff: Compare response headers (cache, CDN, security)
  ✅ Baselines: Accept/reject workflow with automatic + manual baseline control
  🚀 Batch Capture: Capture projects or groups of URLs, compare across environments
  ⚡ Popup: Quick environment switching + fast access to frequently tested pages
  
  Changelog:
  
  1.2.1
   
  ・Automatic comparison — every capture is instantly diffed against its baseline across screenshots, HTML, and headers with configurable thresholds
  ・Auto-accept — identical captures are auto-accepted and cascade up, so you only review what actually changed
  ・Screenshot masks — mask dynamic page regions (ads, carousels, timestamps) by CSS selector —masked areas get a checkerboard overlay in screenshots and their markup is stripped from diffs
  ・Compare script — normalize away noise before diffing: strip analytics, CDN tokens, dynamic selectors, headers — with regex patterns and script filters
  ・Compare script tester — test normalization scripts inline from project settings with live diff preview
  ・Comparison badges — see diff status at a glance on every capture and attempt
  ・Compare filters — filter URL pairs by differences or identical in capture comparison view, with auto-switch to differences when verdicts resolve
  ・Review page — filter by status, bulk accept/reject across captures
  ・Post-capture actions — View, Compare (pre-filtered to differences), and Review buttons after capture completes
  ・Smart script context — page and compare scripts receive auto-upgrading defaults and per-project variables
  ・Configurable page readiness — choose when to capture: on load, network almost idle, or full network idle
  ・Per-project parallel capture — configurable parallel capture concurrency per project
  ・Capture hardening — tab-based capture eliminates the window flash on Windows
  ・Auto-switch to first diff tab with changes when navigating between URL pairs
  ・Clear with baseline preservation, database wipe & storage stats
  ・Switched from Monaco Editor to CodeMirror for a lighter bundle and snappier diffs
  ・Updated help with a new Automation chapter covering all five scripts and variables
  ・Compressed backups — smaller export files, faster backup & restore
  ・Hardened backup & restore — large file support, interactive modals with progress tracking, tab-close prevention
  ・Faster navigation in comparison views due to optimized data loading and rendering
  ・Bug fixes and stability improvements
  
  1.1.0
  
  • Baseline & review workflow — accept/reject captures and individual URLs, automatic + manual baseline pinning
  • Review page — dedicated view for reviewing pending captures with progress tracking
  • Built-in help — documentation with diagrams, covering all features
  • Dashboard with pending review shortcuts
  • Deletion protection for capture-bound attempts
  • Dependency updates and bug fixes
  
  1.0.2
  
  • Database backup & restore
  • Quick capture buttons on project/group lists
  • Compare buttons to diff last 2 attempts/captures
  • Enhanced attempt view with dropdown actions
  • Improved stability when switching/deleting projects
  • UI polish and bug fixes
  
  1.0.1
  
  • Initial release

• Apr 4, 2026
  permissions

  activeTab, tabs, debugger, webRequest

  activeTab, tabs, debugger, webRequest, offscreen

Permissions & access

Permissions

activeTabtabsdebuggerwebRequestoffscreen

Host access

<all_urls>

Screenshots

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