Firefox Community Forum

I get an error message when trying to login to the Social Security website with Firefox. Works with Chrome. The problem just started. Here is the error message.

Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.

I used to be able to ask a question on Firefox and get an answer. Now when I ask for information all I get is advertisements pertaining to the question I am asking.

I run the current version on a Dell Inspiron 15 3530 laptop using Windows 11 Pro. Today, I tried to open my profile file to back it up, but got the message attached below. I searched my computer and found the file in another location.Should I copy the file to the expected location or not?

Printing will not show up when I select print, only save shows. What can I do? When I use a different browser it works fine. Only when I use Mozilla, I can't print.

My credit card payment methods are missing from Firefox's settings. I tried enabling every relevant setting in about:config and still they won't appear. My current relevant settings are shown in the attached screenshot. any suggestions?

I encountered an issue when exporting a theme from Firefox Color. When I downloaded the XPI file, it contained only a `manifest.json` and **did not include the background image files** referenced in the manifest. This caused Firefox to reject the theme as “corrupt” when trying to install or import it.

What I discovered during debugging:

1. Firefox Color provides both a **ZIP** and an **XPI** download.

  The ZIP contains the correct folder structure and the background image files.
  The XPI is missing these files entirely.

2. Because the XPI is missing required assets, Firefox treats the file as corrupt.

3. Importing the broken XPI through the Add-ons Manager or uploading it to AMO also triggers corruption or validation errors.

4. I had to manually inspect the ZIP, extract the proper `images/` directory, and rebuild the XPI myself.

5. I ended up using ChatGPT to troubleshoot the issue, confirm expected manifest structure, correct extension ID mismatches, and verify JSON formatting.

The issue appears to be that Firefox Color’s **XPI exporter is broken or incomplete**, producing theme packages that cannot be installed or validated without manual repair.

It would be helpful if Firefox Color’s XPI export included all necessary files consistently and matched the structure found in the ZIP download.

Trying to figure out how to wide the "line" in between the sidebar, with tabs IN it, and major website. Can anyone have a tip?

I had to do that one, and I cannot remember.

Thanks!

I'm crazy when I DO it. How do I fix?

I like the idea of horizontal tabs, but the line between the topics and the website is TOO DARN SMALL!

How do I go into to make it larger?

I know it's simple, but HOW?

And by the way . . . HAPPY THANKSGIVING!

Thanks!

I reinstalled my pc and when I log back my firefox browser, I can sync everything back, but not the content in my Notes extension, I really need that and can anyone help me how to recover those notes?

nord vpn from desktop icon gives the normal pop up in pic 1. next pic when you go to log in you get the with screen in pic 2. if you try log in from a link nord sent in trouble shooting you get pic 3. if you go to crap browsers like chrome and edge it works fine, but we are removing those programs next weeks for security reasons. so i need this to work on firefox. reinstalled nord with no fix. worked fine 11-2925 but not now 11-30-25

At the moment all websites accessed through Firefox are all crashing after a few minutes and often a lot less. It is happenig constantly. It started before I updated Firefox today, but has continued after the update. Anyone know what's happening? I'm still on Windows 10 - will that be an issue?

Hello,

I just set up a computer with Debian 13 'Trixie', and I downloaded and installed the latest Firefox for Linux (version 145) from Mozilla's site.

Then I noticed at first that it wasn't following my GTK theme. Then after testing a bit, I discovered it would respect only themes with names that end in "-dark". I've taken some screenshots and attached them to demonstrate the problem.

firefox-esr from Debian's repositories didn't have this problem. But also, I've got another computer that still has an older distro (Debian 11) installed, and I'm running the latest firefox 145 on that too, and it always respects my GTK theme regardless of whether its name ends in "-dark". So, perhaps this is a GTK/GTK4 problem or something?

Does anyone know about this issue, can anyone help? I would really like Firefox to respect my choice of theme regardless of whether the theme's name ends with "-dark" or not.

Recently google's advanced search page changed from how it's been displayed for years -- seemingly only on firefox. And I hate the change. It still displays as always on DuckDuckGo and Safari. Firefox is my preferred browser, but I use goodle advanced search myriad times every day and this is changed version is such a PITA that it's approaching being a dealbreaker for me. Sure, I'd like to know wth happened and why, but really I just want google advanced search to return to my preferred display. (It does not just look different, it performs differently, in little ways that matter a lot to me over the multiple times I use it. Be glad to elucidate if it matters.) First attached image is what I'm now getting on ff. Second attached image is what I used to get on ff, and still get on DDG and Safari, and would like back on ff. Please help.