Firefox Support Forum

When trying to launch firefox like normal I got a "Your profile cannot be loaded. It may be missing or inaccessible" which would keep it from starting. Periodically, with firefox not even running in the background, I would get the XULRunner error (see attached image).

Looking online for solutions I took two steps: 1. located my profiles folder and deleted it 2. reinstalled firefox entirely

As you can see by the attached image the same error messages as before would actually interrupt the install itself.

I am at a loss and any help would be appreciated since Chrome sucks and I'd like to keep using Firefox.

When I try to watch video on YouTube or other places. I encounter green line and reverse picture. I have reinstall Firefox but it still persist. Can someone please help me understand how to fix it. As the video bug only happens in firefox. And not in other browsers such as brave or edge. i also se that other people have the samme issue exampel https://support.mozilla.org/en-US/questions/1429053.

There is one domain that I get a "server not found" error for even after doing many things to fix it including everything here, https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can#firefox:win10:fx119, checking blocked URLs in the registry, running malware checks, safe mode, reinstalling FF after removing all FF folders from my system.

Before I did a completely clean reinstall, disabling the Open H264 codec (see attached screenshot) would allow me to access the site. But thinking it was needed, I did the clean reinstall. Now disabling it does not allow access to the site.

So far, I have not found any other websites with this problem. It's a .edu domain which happens to be the one I work for! What else can I do?

After a recent reinstall Firefox seems to have a problem. This seems to be only Firefox specific and I can't find a working solution online after googling.

Youtube videos work, although they do give errors sometimes. A refresh always fixes those. However Twitch/Youtube live streams do not, and display a generic error message. When trying other browsers the live streams work fine.

And old Bugzilla post (https://bugzilla.mozilla.org/show_bug.cgi?id=1467495) describes what I believe to be a possible reason for the problem, however following the solutions in that thread have not yet lead to a solution.

Any further insight or solutions would be appreciated.

Hi, I'm developing a webapp that's designed for print. It uses a "pinterest style" layout to have a column grid of objects with variable heights, and the print styles avoid breaking these items over the page barrier. (In fact, there are two grids on the page, one after the other). The website looks and works fine on screen, and both screen and print work great on Chromium browsers. But on Firefox, using ctrl+P or developer tools' print view causes the page to hang and the tab to ultimately crash.

I know it has something to do with handling the grid layout CSS as the print preview worked fine until I made the change from a traditional row-grid to a column-grid.

The site creates a variable amount of content based on user options at the top of the page. If the content generated is quite small (avoiding a page break?), the print preview works fine. In the link below, I've included some GET variables to guarantee a long amount of content to reliably reproduce the issue.

The site in question.

Hi

I'm tired off spell check constantly saying I'm misspelling words because I'm writing in Danish, so I decided to download the danish dictionary for it, but it isn't working. When I right click on a "misspelled" word, it will only let me choose the default English (United States).

I have triple checked that I actually do have the danish dictionary downloaded an enabled.

Hello, All along I have installed Firefox on my desktop pc with operating system Win. 7 and able to surf the internet etc. though I am aware that at my own risk that this is no longer supported. Recently there was a problem with my pc and I reinstalled Win 7 using the "Firefox Setup 115.4.0esr" where my Firefox account is now related to my gmail in accounts.google.com. From this NEW Firefox website all my previous bookmarks,history etc are not restored at all and instead it showed a fresh page on Bookmarks bar. Please let me know : 1). how to perform my PREVIOUS restoration of bookmarks, history etc ? I did not perform any "Sign in to Syn" because I fear that I will lose my previous bookmarks, history etc. 2). As a test only I keyed in my google accounts password in "Sign in to Syn" and was incorrect ? How can I retrieve/view my ORIGINAL password created in Firefox when I FIRST INSTALLED years ago ? 3). Does it mean that if my ORIGINAL password created can restore all my previous bookmarks, history etc if entered in "Sign in to Syn" ? 4). I DO NOT WISH TO change password because as per article read there is risk that I will lose some/all my previous bookmarks,history etc.

Thank You for your attention and early response.

Best Regards Vincent Ang gmail : [removed email from public]

Hi,

I know how to turn on OS authentication to reveal passwords in about:config (signon.management.page.os-auth.enabled = true) But is there any way to turn this on in registry?

I got a new device and had to sign in and sync everything. When firefox asked about syncing I didn't realize it was asking about using the edge bookmarks to sync with. I tried to cancel but it was too late. Can I undo/remove firefox syncing to edge? Does this mean any changes in Edge will automatically change firefox now? I do not want edge bookmarks/settings. I want to get my old firefox settings back. If it matters: Windows 10 home on one device, Windows 11 on another. All browsers up-to-date.

System Info: 1. Windows 10 Home 22H2 (as of writing) 2. Firefox 118.0.2 (as of writing)

I'm trying to make the simple change of moving the location of the 'find in page' bar from the bottom to the top and I recently discovered that using userChrome.css was the way to do it. I followed this tutorial in the following link, https://www.userchrome.org/how-create-userchrome-css.html, making sure to put the "chrome" folder in the right location C:\Users\myName\AppData\Roaming\Mozilla\Firefox\Profiles\sfytm5xk.default-release, switching the toolkit.legacyUserProfileCustomizations.stylesheets to true, entering the code snippet into the userChrome.css using VSCode, and restarting the browser for the changes to take effect.

After the first restart, I found that the 'find in page' bar was still at the bottom and nothing had changed. I restarted the browser about 10 more times and nothing changed still. I looked through the Mozilla Support forums, r/FirefoxCSS and r/Firefox subreddits for an answer and came across a few posts with similar problems, tried their recommended solutions such as downloading the userChrome.css file from the website tutorial, double-checking that File Explorer would show file extensions when creating or renaming files, or even restarting my computer and yet none have worked.

I have no idea what's wrong so feel free to share what you think the problem might be and possible solutions in the replies.

Hello,

Sometimes, when I click an embedded/hyper link within Firefox, say I tried clicking a link provided after I google searched something, the tab itself would hang for 10 seconds before it would begin loading the site. When I say "hang", I mean that the entire tab becomes unresponsive to my clicks, I can't refresh the page, I couldn't change the address bar to a different link (it would allow me to manipulate the address bar, but the browser wouldn't reflect on that change, instead just going to the link I had clicked before the hang after the 10 second delay) and my mouse just stays as one sprite/disappears all together (when on the tab).

I find that this isn't a full browser issue as I can easily just start another tab and try there, but this issue is prevalent in that it randomly hangs any one tab I'm using for 10 seconds, and it's not just with Google.

I've identified that it isn't an extension issue or a different tab being used (tested in troubleshoot mode), nor an accessibility issue (as far as I know). I've disabled both my firewall and antivirus temporarily and it still occurred.

It's gotten in the way of a lot of work and I haven't been able to find anything regarding this exact problem on the support site. I've been dealing with it since my first installation of firefox (a few months ago).

This problem started yesterday and I cant seem to fix it where youtube is too wide for my screen without any indicator on the top of my screen saying that its zoomed in and I cant watch any videos fullscreen. This glitch isn't a problem on any other websites. I tried opening and closing the browser, I tried restarting my computer tried clearing my cache and cookies and I tried using different accounts but none of them seem to fix the problem!

Photo 1: What it looks like right now Photo 2: What it should look like (had to use private tab) Photo 3: What search looks like Photo 4: What search should look like Photo 5: I cant see any videos fullscreen

Hello,

When I try to log in to tradestation.com, I get a 403 Forbidden message. I have gone to Settings - Clear all History, and checked all the History and Data boxes, and clicked OK. Also, I only use Private browsing, which is set to remove all history, caches, etc. whenever I close Firefox. I have been logging in to tradestation 4 or 5 days a week for months, until today. Please help fix this.

Thank you, Barry

I was trying to sync my settings to my new laptop with my login and PW (which was correct) and it kept telling me it wasn't right. So, I decided to change it but my MFA on Google for Firefox got wiped once I switched phones. I had to use a backup code to get in and want to re-enable the MFA.

Unfortunately, and for no real reason, it won't work. I scan the QR code in Google Authenticator, it sets up and gives me a code, I enter the code, and then it tells me it's the wrong one. I even tried to do it by manually setting it up and it made no difference. Now I can't re-enable it because it won't work right.

What the actual hell is going on here, guys?

After the latest update (117.0 64-bit) I now do not see the '+' sign in the tab bar. I have 40 tabs open (please, no negativity - it's always worked for me), but if I close all of the tabs it reappears. Re-open the original 42 tabs and it's gone again. Close them and it reappears, etc. Now for the fun bit: starting from scratch with a new window - the '+' is there, but open 20 more tabs and it goes.

I have a Logitech mouse. I've used it with both Brave and Chrome problem without problems highlighting text. But the highlight function doesn't work properly with the mouse in FF.

I can double click and highlight a paragraph. I can highlight a single word with no problem. But when I try to highlight a series of words or a full sentence, I can't. Either it highlights but when I try to Copy the highlight disappears. Or when I drag the mouse to highlight it won't highlight at all.

Since the issue only occurs in Firefox and not other browsers, there has to be something in Firefox that's causing this; or some conflict causing highlighting not to work.

I'd be grateful for any ideas how to fix this. It's driving me crazy.

When I sign in to a website I check the box saying 'remember this computer' but FF doesn't seem to allow this. I have to go thru the security login every single time, like when signing in to a google account. It works on Chrome but not FF.

This may be related: sometimes the page displayed on FF doesn't function as it should. Example: I was using Quickbooks online and when I clicked the HELP button nothing happened. I thought it was an Intuit problem until I used Chrome and found the HELP button worked.

thanks

Today firefox can't lunch at all, I made a clearing, also reinstalling (but not "clear" reinstall). There is no any crashes or crash reports, it just doesn't launch