Changed

• Localization: Added Vietnamese (vi) / English (en) menu translations for GM_registerMenuCommand, with a language toggle.

Added

• Page-context injection: heavy patches now run inside the real page context via injected <script> instead of relying on @inject-into auto behavior.
• CSP nonce support: introduced waitForNonceAndInject() to poll for an existing script[nonce] and inject with the same nonce. Includes a timeout-based fallback injection.
• Config option for preload removal: added NUKE_PRELOAD toggle (with menu item) to enable/disable removing preload/prefetch/modulepreload links.
• XHR metrics blocking: metrics blocking now covers XMLHttpRequest in addition to fetch.
• Selective sendBeacon blocking: blocks only “noisy” metric endpoints instead of disabling all beacons.

Changed

• Feed cleanup strategy:

  • prunes old tweets using content-visibility: hidden + locked height (contain-intrinsic-size/height) to reduce paint/layout cost while preserving scroll layout.

• Preload removal behavior:

  • removal is optional and controlled by NUKE_PRELOAD.

• Injection string building:

  • avoids template-literal wrapping for injected code to prevent syntax breakage when main() contains template strings.

Removed

• Global MutationObserver override (v1 soft-throttle): removed to reduce the risk of breaking React/virtualized rendering behavior.
• Global PerformanceObserver override (v1 “brutal block”): removed to avoid interfering with page performance instrumentation.
• Hard tweet removal loop (v1 articles[i].remove() GC): removed for stability and to avoid breaking feed state/infinite scroll.

Set default injection mode = auto/page

v1.3.6
- perf: throttle setTimeout same as setInterval to reduce CPU wakeups
- fix: correct override to no-op only longtask/resource/paint observers
- perf: add modulepreload removal to block bundler prefetch
- perf: apply content-visibility to sidebarColumn to reduce offscreen layout cost
- perf: lower fetchPriority for images to save bandwidth
- style: extend cleanup for gradient/shadow utility classes

v1.3.5
- feat: add localization & extended language support (50 locales)
- chore: unify metadata descriptions & names

v1.3.4
- refactor: replace MutationObserver blocker with throttled version
- fix: restore feed loading & modals on X.com (no more broken infinite scroll)

v1.3.3
- refactor: rewrite PerformanceObserver patch to safe version (fix arguments/constructor issue)

🧠 X.com Heavy JS Optimizer+ — Changelog

v1.3.1-pre (2025-10-23)

Fixes & Stability

• Fixed critical TypeError: root.querySelectorAll is not a function caused when onReady() fired before the DOM was available.
• Added safety guards for both scanVideos() and scanImg() to prevent crashes on non-Element nodes.
• Ensured first DOM scan is triggered correctly using onReady() (no more skipped optimization for initial videos/images).
• Improved overall stability on browsers with aggressive preload or delayed DOM construction.

Performance Enhancements

• Maintained @run-at document-start for maximum patch coverage (fetch, rAF, and setInterval hooks initialize early).
• Added lightweight checks to reduce redundant MutationObserver calls.
• Optimized early CSS injection timing for faster compositor cleanup.

Behavior Improvements

• Video & image optimization now runs both:
  • Once after DOM ready (onReady).
  • Continuously via live MutationObserver for new tweets.
• Prevented double-injection and redundant event listeners.

Developer Notes

• This version is functionally identical to v1.3.0, but much safer and crash-free.
• Considered stable for daily use.
• Future builds will focus on:
  • Live FPS/Memory overlay (performance HUD).
  • Smart DOM cleanup (auto remove old tweets after 10+ minutes).

v1.3.0 (Initial Public Release)

Core Features

• Full optimization suite for X.com/Twitter:
  • Removes heavy CSS (blur, backdrop-filter, linear-gradient).
  • Forces content-visibility: auto on feed articles for massive paint savings.
  • Caps frame rate to ~45 FPS during long tasks (Aggressive Mode).
  • Pauses offscreen videos and enforces single active video decoding.
  • Auto-lazy-loads and async-decodes all images.
  • Optionally blocks analytics (scribe, metrics, client_event, etc.).
• User menu (GM_registerMenuCommand) to toggle:
  • Aggressive Mode ON/OFF
  • DOM feed limit
  • Analytics blocking

Adaptive Runtime

• Auto-detects browser long tasks via PerformanceObserver.
• Dynamically enables “Aggressive” or “Ultra” mode when lag spikes.
• Reduces setInterval density to lighten CPU usage.

Author

Oppai1442
GreasyFork Profile

License: MIT