Issues

• navigator.platform changed, but not the user agent string

  kkapsner/CanvasBlocker#815 · Filter by author slbmcsclrc opened on Oct 23, 2026
  1

• Wizzair login fails

  kkapsner/CanvasBlocker#814 · Filter by author HifeFish opened on Oct 18, 2026

• crash on egui (rust wasm lib) website

  kkapsner/CanvasBlocker#813 · Filter by author orkeilius opened on Oct 7, 2026

• Persistent RNG seed keyed by frame's own origin, not top-level site -- cross-site tracking via same-origin third-party iframes

  kkapsner/CanvasBlocker#812 · Filter by author router0mail opened on Sep 18, 2026

• pay.google.com is not working when this plugin is enabled (firefox)

  kkapsner/CanvasBlocker#810 · Filter by author gitkoyot opened on Aug 18, 2026
  2

• Breaking Canon support website

  kkapsner/CanvasBlocker#809 · Filter by author kalshyre opened on Aug 15, 2026

• Firefox AI chatbot sidebar

  kkapsner/CanvasBlocker#808 · Filter by author o7ux opened on Jul 23, 2026

• Something aint working

  kkapsner/CanvasBlocker#807 · Filter by author Player3X opened on Jul 13, 2026

• TextMetrics test Number of differences doesn't stay the same when CanvasBlocker is disabled when either TextMetrics API or DOMRect API protection is disabled

  kkapsner/CanvasBlocker#806 · Filter by author Willie169 opened on Jul 13, 2026

• DOMRect test Range.getBoundingClientRect different from others

  kkapsner/CanvasBlocker#805 · Filter by author Willie169 opened on Jul 13, 2026

• Breaks rutracker

  kkapsner/CanvasBlocker#803 · Filter by author j123xyz opened on Jun 12, 2026

• Breaks IKEA PAX wardrobe designer

  kkapsner/CanvasBlocker#801 · Filter by author trali opened on May 5, 2026
  2

• Completely breaks login for Bandcamp.com

  kkapsner/CanvasBlocker#799 · Filter by author blargggaaa opened on Apr 30, 2026
  1

• Uploded image gets inverted on Instagram.com

  kkapsner/CanvasBlocker#798 · Filter by author cr1ptal opened on Apr 30, 2026
  2

• Epic Store redeem gets broken, and the only fix is completely disabling the extension

  kkapsner/CanvasBlocker#794 · Filter by author hjk789 opened on Mar 20, 2026
  6

• Timezone Spoofing

  kkapsner/CanvasBlocker#785 · Filter by author ghost opened on Jan 9, 2026

• dom.maxHardwareConcurrency

  kkapsner/CanvasBlocker#782 · Filter by author ghost opened on Dec 30, 2025

• WebGPU Fingerprinting Protection

  kkapsner/CanvasBlocker#781 · Filter by author joshcangit opened on Dec 20, 2025
  1

• Blocking whole site at recrutement.education.gouv.fr

  kkapsner/CanvasBlocker#778 · Filter by author Cwpute opened on Dec 10, 2025
  3

• Font Fingerprinting Protection

  kkapsner/CanvasBlocker#777 · Filter by author ghost opened on Dec 9, 2025

• When using ChatGPT in Firefox, this extention will freeze the page or slow it to a snail's pace.

  kkapsner/CanvasBlocker#775 · Filter by author 39ckjdu45 opened on Nov 20, 2025
  3

• Plugin causing an issue with the view cube in the onshape website

  kkapsner/CanvasBlocker#773 · Filter by author Screenhead opened on Oct 8, 2025

• Block Touchscreen Fingerprinting

  kkapsner/CanvasBlocker#770 · Filter by author moakt3 opened on Aug 26, 2025

• Canvasblocker toggle on/off while on ANY site is not working, whitelist/blacklist also not working at all.

  kkapsner/CanvasBlocker#769 · Filter by author BuxtonWater opened on Aug 19, 2025
  3

• Title: outerHeight protection causes value fluctuation on mobile when combined with RFP

  kkapsner/CanvasBlocker#768 · Filter by author Did-0001 opened on Aug 12, 2025