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I have my credit card info correctly saved in the FF settings on my PC desktop, but it doesn't work correctly on some online forms.

When it fails to work I click on the truncated information for the saved credit card I wish to use, but it fills in later numbers in the sequence incorrectly with the wrong digits and too few numbers to even be a legitimate credit card number

I have double checked in the settings, "privacy and security", and the credit card numbers are entered correctly there and enabled.

The form I have most recently had issues with were for a local "big day of giving" site, and it is powered by something called "mighty cause."

I can't include a screenshot of the issue itself occurring or my settings, for obvious reasons.

My PC is windows 11 home edition, and the version of Firefox is 150.0.1 (I think).

When I click Bookmarks > Manage Bookmarks I'm taken to Other Bookmarks where I never store anything. I'd delete it if I could but it doesn't appear to be an option, so instead I'd like to taken directly to Bookmarks Menu. I came across this post from just over 4 years ago which sounded like it's exactly what I want, but it doesn't work. Are there any changes anyone can suggest that would allow it to work in 2026?

https://support.mozilla.org/en-US/questions/1373437

You can use the autoconfig.cfg file in the Firefox installation folder to initialize (set/lock) preferences and run privileged JavaScript code. In this case code to open the Library with the Bookmarks Menu folder selected. You can modify the showPlaces variable to open any of the four possible root folders (in this case [1]).

To use Autoconfig, place two files into the Firefox installation directory.

   on Windows and Linux, they go into the same directory where Firefox is installed
   on macOS, they go into the Contents/Resources directory of the Firefox.app 

The autoconfig.js file that specifies to use autoconfig.cfg is placed into the "defaults\pref" directory where the channel-prefs.js file is located.

The autoconfig.cfg file is placed at the top level of the Firefox directory.

   autoconfig.cfg and autoconfig.js need to start with a comment line (//)
   autoconfig.js needs to use Unix line endings (LF instead of CR/LF) 

See also:

   https://support.mozilla.org/en-US/kb/customizing-firefox-using-autoconfig 

Content of autoconfig.js

//
pref("general.config.filename", "autoconfig.cfg");
pref("general.config.obscure_value", 0);
pref("general.config.sandbox_enabled", false); // disable sandbox to allow privileged JavaScript

Content of autoconfig.cfg

// first line in autoconfig.cfg is a comment line try {

let {classes:Cc, interfaces:Ci, manager:Cm, utils:Cu} = Components;
var Services = globalThis.Services || ChromeUtils.import("resource://gre/modules/Services.jsm").Services;

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) {
     let showPlaces = ["AllBookmarks","BookmarksMenu","BookmarksToolbar","UnfiledBookmarks"][1];
     elm = document.getElementById("Browser:ShowAllBookmarks");
     if (elm) {
      elm.setAttribute("oncommand", "PlacesCommandHook.showPlacesOrganizer('"+showPlaces+"')");
     }
   }
  }
 }
};
if (!Services.appinfo.inSafeMode) { new ConfigJS(); }

} catch(e) {Cu.reportError(e);}

How can I resolve the failure to open because it can't find the XPCOM. I downloaded a new copy but the computer insists on using the older, faulty version to open files and it will not work.

I am running 150.0.1 on Debian with Cinnamon. I set the fonts to use for Chinese to a custom fonts, where I left Latin fonts to use untouched, I found I must set Latin to use my custom Chinese fonts in order to display Chinese webpage properly, where the English fonts will get out of place, extra spacing in Apostrophe for example, "It's" will become "It 's", this is particular trouble when viewing on Youtube. But I set to use the same custom fonts on Chrome both English and Chinese displayed perfectly.

Why has  << teaseyourmatch.com >> opened its webpage yesterday & for several months while; today it won't load the homepage whatsover? This is an adult dating website from Eurozone w over 125000 users

When watching twitch and I open another tab, the new tab is very slow to open a web page and sometimes wont open at all just keeps scrolling. Any suggestions how to solve this problem?? I tried with Opera and it doesnt have that problem?? Dont want to give up on Firefox as I like it the most. Any help much appreciated.

BR

Mika Nyqvist

I can't upload files such as photos to AI generators.When I try to upload the list of folders pop up but when I click on any of the folder the content I know is there doesn't appear. Why? At the bottom of this question area there is an image upload option but for some reason I am unable to access my files to upload. I am perplexed.

after the last update of firefox, the default firefox home page doesn't load. Instead, I get the message: Oops, something went wrong loading this content. Any ideas?

I was trying to do something with my bookmarks yesterday and I must have pushed the wrong icon. Firefox then became unavailable. I'm 88 years old and not fully at home with computer language. I tried Chrome, but it's not available like Firefox.

When I click on option/link for "Print using the system dialog box", the print preview no longer works. Instead I see message "This app doesn't support print preview" in preview pane.

On all other browsers the drop down menus still show after first use, except in Firefox - where after first use they disappear and you have to go back to Home to re-show them.

I have tried the suggestions give for configuring the site iin Elementor/Wordpress but none have solved the problem and I can only assume the answer lies in Firefox settings.

TIA

For quite some time now, I am unable to sign in to my account at CanadianTire.Ca I get an error. The signon process goes to CustomerAuth.Triangle.Ca for the email and password input. When I click "Sign In" the return message is a yellow triangle followed by the word "undefined" (see attached).

All other browsers I have (Brave, Chrome and Edge) can sign in without issue.

I noticed that other users have the exact same issue. I have tried all solutions I could find. The browser is up to date as of today (150.0.2 64 bit). I tried troubleshoot mode, clearing the cache, deleting cookies, history .... On the web site I turned off ETP for CanadianTire.Ca and CustomerAuth.Triangle.Com.

I have used Firefox since it was v0.93.

H E L P ! ! !

No Bookmarks (which are shown as imported from Chrome, almost 163 number of Bookmarks) are visible anywhere in Firefox. They are neither stored in the Bookmarks Tool Bar nor in any folder named Imported from Chrome. This is the situation. Uninstalled Firefox, removed all Folders (including the ones in hidden folders) and cleaned the Registry. Restarted the PC, reinstalled Firefox directly from the firefox site online, tried importing the Bookmarks from Chrome after restarting on installation of Firefox. Saved All passwords from Chrome as a CSV file (a Firefox requirement) and tried importing Bookmarks from Chrome along with the Passwords from the CSV file saved on Desktop. Again, the importing showed 163 Nos. of Bookmarks are imported. But on restarting Firefox, no bookmark could be found. Neither in the Bookmarks toolbar nor in any folder named with any name. My Bookmarks toolbar is checked as Always visible. I DO NOT KNOW WHAT TO DO NOW TO MAKE THE FIREFOX WORK as in the previous version. This kind of an error has crept only after updating Firefox to v150.0.1.

i have had intego vpn for some time, historically i was able to use firefox and intego vpn to access web sites only after i had executed a shut-down and restart, not good but it worked if i needed, but there is now an inability for Firefox to establish a valid connection to any website when intego vpn is active, both firefox and mac-os are up to date

what do i have to do to get firefox and intego vpn to work together?

sadly intego vpn performed well with chrome but chrome brings it's own problems:)

Went to VRBO website to look at a reservation and the website, which showed me as signed in, showed nothing of the reservation. Said I had no reservation,, no history of saved searches. When I used Microsoft Edge, all my previous reservations, searches etc. were accessible. I cleared my Firefox cookies, etc. still had the same problem

Hi, it looks like Firefox can copy links from selected tabs, using right-click menu. It doesn't work for non HTTP(S) addresses though, such as "file:///C:/Users/USER/etc."

Is it possible for non HTTP(S) addresses?

The add on Export Tabs URLs by AL is very good, has the option for non HTTP(S) addresses, but I couldn't get it to work for selected tabs, is it possible for selected tabs?

A pain in the ass I do not want updates I have it marked on settings every update I get screws up computer I do not do a lot except stock market then take a nap I am 88 and not interested in playing games or silly stuff