1.1.4

🐛 Critical Bug Fixes

Fixed SPA freeze issue (GitHub, Gmail, etc.)

• Problem: Extension caused Chrome to freeze when navigating on Single Page Applications
• Symptoms:
  • Network requests hanging ("pending")
  • Memory usage growing to GBs
  • Page completely frozen
  • Browser unresponsive
• Root cause:
  • UrlChangeDetector was observing entire document with aggressive throttling
  • MutationObserver firing thousands of times during DOM changes
• Fix:
  • Changed from throttling to debouncing (500ms wait after last mutation)
  • Reduced observation scope to only <title> element instead of entire document
  • Prevents callbacks during heavy DOM manipulation
• Impact: ~99% reduction in observer callbacks → massive performance improvement
• Files changed:
  • src/content/UrlChangeDetector.ts
  • src/content/RuleApplicationService.ts

Fixed "unique tab" closing wrong tabs

• Problem: Unique feature was closing unrelated tabs (e.g., Gmail when refreshing GitHub)
• Root cause:
  • When url_fragment doesn't contain $1 placeholder, _processUrlFragment() returns same value for all URLs
  • This made all tabs appear as duplicates
• Example scenario:
  • Rule: url_fragment: "github.com/issues", url_matcher: "github\.com/.+/issues/(\d+)"
  • GitHub tab: processed to "github.com/issues"
  • Gmail tab: also processed to "github.com/issues" (no match, returns fragment as-is)
  • Both equal → Gmail closed! ❌
• Fix:
  • Added validation: tabs must match url_matcher pattern before comparison
  • Without url_matcher: compare exact URLs only
  • Prevents closing tabs that don't match the rule's pattern
• Impact: Unique feature now works correctly, no more random tab closures
• Files changed: src/background/TabRulesService.ts
• Tests added: src/background/__tests__/TabRulesService.unique.test.ts (85 new test cases)

✨ New Features

Rule copy/paste functionality

• Feature: Copy rules to clipboard and paste them to duplicate
• How to use:
  • Click copy icon next to a rule → copies to clipboard
  • Click "Paste rule" button → creates new rule from clipboard
• Use case: Quickly duplicate rules with slight modifications
• Feature flag: Can be disabled via FEATURE_FLAGS.ENABLE_RULE_COPY_PASTE
• Files changed:
  • src/Options.vue
  • src/stores/rules.store.ts
  • src/components/options/center/sections/TabRules/TableRules.vue
• Files added: src/components/icons/ClipboardIcon.vue

Paste rule: Auto-refresh

• Problem: After pasting a rule, the list didn't refresh to show the new rule
• Fix: Store automatically refreshes after paste operation
• Files changed: src/Options.vue

🔧 Technical Improvements

Feature flags system

• Added: src/common/feature-flags.ts for toggling experimental features
• Current flags:
  • ENABLE_RULE_COPY_PASTE: Enable/disable copy/paste functionality

URL change detection optimization

• Before: Throttled MutationObserver checking every 100ms during mutations
• After: Debounced observer waiting 500ms after mutations settle
• Result: Only checks URL after DOM changes complete, not during

Observer lifecycle management

• Properly disconnect observers before creating new ones
• Prevents memory leaks from accumulated observers
• Better performance on long-running tabs

🧪 Tests

Comprehensive unique tab test suite

• 85+ new test cases covering all unique tab scenarios
• Tests for GitHub-style URLs with issue numbers
• Tests for simple CONTAINS detection without url_matcher
• Edge cases: nested duplicates, different issue numbers, etc.
• Files added: src/background/__tests__/TabRulesService.unique.test.ts

🎯 User Impact

For users experiencing Chrome freezing:

• ✅ FIXED: GitHub navigation no longer freezes
• ✅ FIXED: Gmail and other SPAs work smoothly
• ✅ FIXED: Network requests complete normally
• ✅ FIXED: Memory usage stays stable (no more GB growth)

For users experiencing unique tab issues:

• ✅ FIXED: Unique feature no longer closes random tabs
• ✅ FIXED: Gmail won't close when refreshing GitHub
• ✅ FIXED: Only true duplicates are closed

For users wanting to duplicate rules:

• ✅ NEW: Copy/paste rules for quick duplication

📊 Performance Metrics

• Observer callbacks: ~99% reduction on SPAs (thousands → ~10 per navigation)
• Memory usage: Stable (prevents GB-scale growth)
• CPU usage: Dramatically reduced during SPA navigation
• Debounce delay: 500ms after DOM changes settle
• Test coverage: 218 tests passing

🔄 Migration Notes

No migration needed. All changes are backward compatible.

For users with unique tab rules:

If you were experiencing tabs closing incorrectly, this should now work as expected.

For REGEX users:

Patterns with nested quantifiers (e.g., (?:[\w-]+\.)*) are blocked for security.
Use simplified patterns instead: google\.com/.*/u/5/

⚠️ Known Issues

None reported. All critical bugs from 1.1.3 have been resolved.