[Bug]: Can't use firefox.cfg

[fulalas]

Pre-Submission Checklist

• I have checked the existing/closed issues to ensure this issue has not already been reported.
• I am using the latest supported version of the browser.
• I have tried disabling all browser extensions/add-ons to rule out interference from these.
• I have tried clearing the browser cache and cookies.
• I have checked with a new profile and the issue still occurs.
• I have provided detailed step-by-step instructions on how to reproduce the issue.
• I have included relevant screenshots or console outputs.
• I have checked that this problem is not occurring in the latest version of Firefox ESR.
• This issue is specific to this browser and does not occur in other browsers.

Bug Summary

In order to disable ctrl+shift+s and ctrl+shift+d shortcuts, in Firefox I've been using firefox.cfg file with this:

// start autoconfig.cfg with a comment line
try {
 function ConfigJS() { Services.obs.addObserver(this, 'chrome-document-global-created', false); }
 ConfigJS.prototype = {
  observe: function (aSubject) { aSubject.addEventListener('DOMContentLoaded', this, {once: true}); },
  handleEvent: function (aEvent) {
   let document = aEvent.originalTarget;
   let window = document.defaultView;
   let location = window.location;

   if (/^(chrome:(?!\/\/(global\/content\/commonDialog|browser\/content\/webext-panels)\.x?html)|about:(?!blank))/i.test(location.href)) {
    if (window._gBrowser) { //place your code here
      let attr, elm, key, mbo;
      let KEYS = ['key_closeWindow', 'key_screenshot', 'bookmarkAllTabsKb'];
      let ATTR = ['key','modifiers','command','oncommand'];
      for (key in KEYS){
       elm = window.document.getElementById(KEYS[key]);
       if (elm) for (attr in ATTR) if (ATTR[attr] in elm.attributes) elm.removeAttribute(ATTR[attr]);
      }
    }  // gBrowser
   }   // location
  }    // handleEvent
 };    // prototype
 if (!Services.appinfo.inSafeMode) { new ConfigJS(); }
} catch(e) {Cu.reportError(e);}

Then all I need is to create defaults/pref/autoconfig.js with this:

pref("general.config.filename", "firefox.cfg");
pref("general.config.obscure_value", 0);

And voila, the shortcuts (ctrl+shift+s and ctrl+shift+d) are disabled.

Now, in Floorp this doesn't work. I tried to rename firefox.cfg to floorp.cfg (also changing the reference in defaults/pref/autoconfig.js) but still no luck.

Reproduction Steps

1. close Floorp
2. create firefox.cfg file in the browser main folder (not the user profile!) with the content explained in the summary above
3. create defaults/pref/autoconfig.js file in the browser main folder (not the user profile!) with the content explained in the summary above
4. open Floorp
5. the following shortcuts should be disabled but they are not: ctrl+shift+s and ctrl+shift+d

Expected Behavior

The following shortcuts should be disabled: ctrl+shift+s and ctrl+shift+d

Actual Behavior

The following shortcuts should be disabled but they are not: ctrl+shift+s and ctrl+shift+d

Screenshots

Doesn't apply

Browser Version

11.24.0

Operating System

PorteuX 1.9 x64 (Linux)

Additional Context

This is confirmed to be working in all Firefox 128.x ESR so far.