[Twilight 1.11.5t] Close window button doesn't work.

[Asidius]

Captchas

• I have read the instructions.
• I have searched existing issues and avoided creating duplicates.
• I am not filing an enhancement request.
• I have checked that this issue cannot be reproduced on Mozilla Firefox.
• I have checked that this issue can be reproduced once I removed all my Mods and Custom CSS.

What happened?

Unable to close the browser using the windows close button. Min and Max works though.

Recording.2025-04-23.080740.mp4

Version

1.11.5t

What platform are you seeing the problem on?

Windows - x64

What component is this issue related to?

Other

Relevant log output if applicable

[Propheticus]

Additionally, using Ctrl + Shift + Q to quit results in leftover processes:

twilightRefusesToQuit.mp4

Upon clicking exit, this uncaught error is thrown:

Uncaught TypeError: browser is null
    CanCloseWindow chrome://browser/content/browser.js:4300
    WindowIsClosing chrome://browser/content/browser.js:4333
    tryToCloseWindow chrome://browser/content/browser-commands.js:429
    <anonymous> chrome://browser/content/browser-sets.js:66
browser.js:4300:9
    CanCloseWindow chrome://browser/content/browser.js:4300
    WindowIsClosing chrome://browser/content/browser.js:4333
    tryToCloseWindow chrome://browser/content/browser-commands.js:429
    <anonymous> chrome://browser/content/browser-sets.js:66

Unsure if related, periodically this error is caught:

TypeError: browser is null 2 TabState.sys.mjs:78:9
    #collectBaseTabData resource:///modules/sessionstore/TabState.sys.mjs:78
    collect resource:///modules/sessionstore/TabState.sys.mjs:37
    ssi_collectWindowData resource:///modules/sessionstore/SessionStore.sys.mjs:5432
    getCurrentState resource:///modules/sessionstore/SessionStore.sys.mjs:5258
    getCurrentState resource:///modules/sessionstore/SessionStore.sys.mjs:663
    _saveState resource:///modules/sessionstore/SessionSaver.sys.mjs:241
    _saveStateAsync resource:///modules/sessionstore/SessionSaver.sys.mjs:322
    saveStateAsyncWhenIdle resource:///modules/sessionstore/SessionSaver.sys.mjs:173
    callback resource://gre/modules/Timer.sys.mjs:126
    (Async: ChromeUtils::IdleDispatch handler)
    requestIdleCallback resource://gre/modules/Timer.sys.mjs:130
    _timeoutID resource:///modules/sessionstore/SessionSaver.sys.mjs:176
    notify resource://gre/modules/Timer.sys.mjs:49