Firefox Support Forum

Here is a sample URL that works on Microsoft Edge (current version) and receives an error message on Firefox (115.0.2): https://www.t-mobile.com/home-internet The error received from the web site when using FF is:

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

FF was working with all T-Mobile pages a few months ago and now fails with this same error on most pages.

To test on Edge, I pasted the identical address that failed in FF into Edge and it worked fine so I am confident I am comparing the same web page on the two browsers.

Thanks for your help. Claude

I have Mac 10.12.6 on an "early 2009" 27" iMac. I'm waiting for the new 27/32inch iMac until I upgrade hardware and operating system. The release notes with FF V115 say in part " Users on those operating systems will be migrated to the ESR 115 version of Firefox."

I want to clarify that when I update to FF 116, FF will automatically install the ESR version, or will I need to do this manually? Also, will this update take a long time, like FF will be installing a totally new (ESR) version, rather than "just" the usual update?

The only icons I can see on the right hand side of my toolbar is the NoScript icon, along with the Save to Pocket, FF Account, Extensions and hamburger buttons.

I should have about 12.

I just installed a new system, launched FF and set it up to sync with my account. Everything else appears to run fine - passwords, history, etc. The Tree Style Tab works fine too.

I have double checked the other solutions I found here, such as private viewing options, or trying to find the icons in the customize screen, but that's not the issue.

My other FF instances on other machines are still fine.

I just updated FF on this problem machine to 115.0.2 but no joy.

hi, something happened to my themes. i can no longer see the preview/thumbnail of them, also the authors link is gone. i've been trying everything for hours, but couldn't find anything in about:config that worked. any help would be great, thanks!

I used to be able to simply click and drag to reorder bookmarks but this no longer works (Firefox 115.02). Is there a new way to do this or, if a bug, when will it be fixed?

I am receiving the message Did Not Connect: Potential Security Issue ... requires a secure connection ... when trying to access my Shopify website AngelFallsHomes.com. This ONLY happens with Firefox; all other browsers are working fine. What do I do to fix this because obviously it is a huge concern.

Firstly, I have a brain injury. I am easily overwhelmed by information and am slow to understand - especially anything to do with I.T.

Recently, I began successfully accessing the internet / Firefox via my Wifi Repeater. As of two or three days ago. I keep being asked to "log in to access the Internet", but even after I do it (successfully, as far as my repeater is concerned) I'm no further forward; I keep being asked to log in.

Thanks to my repeater I have a strong signal when in my garden office. But after a month, Firefox has suddenly stopped allowing me to use it. I am back at Square 1, before I purchased the thing.

I need need to work from my office. Please help resume my Repeater's access.

Kind regards,

Sean

Is there a shortcut to deattach tabs from one browser window so it turns into seperate window, so that you don't need to deattach tabs with clicking and dragging them with mouse?

For a while now (can't remember when it started) rendered graphics and text on FF is fuzzy. Examples of this can be see on Google maps, Miro, Powerpoint etc. On Chrome, Edge etc the rendering is sharp at all zoom levels but in FF its fuzzy until you zoom in.

Viewing on a 4k monitor, running 115.0.2 (64-bit), using the Windows store install Hardware acceleration is turned on. Tested on multiple PCs, all Windows 11

Attached images which shows the comparison between Firefox and Edge Both browser windows are the same size and the default zoom (100%) Examples attached are for Miro and Powerpoint

I have a Plesk (apache) server that is behind HAProxy. When I connect securely to a web site through HAProxy using Firefox, I get long delays. If I use Safari or Chrome, the pages come right up without any delay.

If I connect to the Plesk server directly without HAProxy in the middle, there are no delays.

I do not know what would cause these delays that don't occur with other browsers.

I'm on a Mac: 115.0.2 (64-bit)

I like when I open a bookmark, that I am not forced to view it right away. This can be VERY annoying when opening multiple bookmarks but I want to stay on my current one without having to switch back to the one I was using. I would like an option added at least to have bookmarks in that automatically switch to when opening. Please.

Well done Firefox team.

I got a notification this morning telling me I could update Firefox to the latest version and I had nothing urgent so I did.

Imagine my suprise when all my bookmarks, my passwords and logins appeared to have disappeared. Well, not just "appeared", since I can't find them anywhere on my machine right now.

I've been using Sync for years and when I finally managed to connect (because apparently the password I had been using was wrong ? But did FF tell me ? No ...), I discovered nothing had been saved. Ever.

A really nice morning.

Hello, my WIN 10 Drive got busted, meaning I can not boot with it anymore. However, with an other WIN10 drive I still can access the data. I need to save all the Firefox bookmarks before I will format the Drive and install a fresh WIN10. All the searches just tell how to backup when Firefox is open or Win is running: Press WIN Key... etc. None of them is applicable. I have I have bookmarks saved as bookmarks as well as I have a lot on the upper bar. I need them all.

Please teach me how I can back them up and restore on a fresh Firefox. In previous crashes I lost a lot of bookmarks already. ' Thank you.

Dorian

Apps Firefox and Thunderbird are having problems opening links to webpages. In particular, Cloudflare cannot verify (it just cycles between a checkbox "Are you human?" and a browser check) when I use FF.

I use Win11 with NordVPN, but this wasn't a problem before the latest Win11 update. (It also seems to have affected TB reconnecting to Ymail.) I'm now using Chromium to read my Ymail avoid Cloudflare verification, but I'd rather keep using FF and TB apps.

I've been going though Cloudflare, NordVPN and Mozilla online help for a few days now, and I think I've tried everything there.

Thoughts?

No matter what I try, I can't allow any sites to present my screen or a window, I can't find an option in settings neither in the option to allow in the tab. The "allow" button is simply not available at all. How do I solve that? The problem happens in all sites that I've tried: focusmate, cofocus, discord, google meet, etc

the website channel 4 wont load and videos wont play on the normal firefox. it was fine a couple of weeks ago. if i load the website in private window, it works fine wiht no issue.

OK I am not sure this is a Firefox issue but my g-mail account is sending composed messages to the TRASH folder. I have been using Proton Mail and have a number of email address depending on who I am emailing

Tried a few changes to my g-mail account disabled IMAP and POP that did not work I have a number of blocked email address did not delete these

This morning when I exited firefox and then tried to bring it up again (windows10) I got an error message

Error Platform version 118.0.1 is not compatible with

       MinVersion >= 118.0
       MaxVersion >= 118.0

I have a lot of of Important Book Marks and don't have the bookmarks backed up any where.

I don't remember updating Firefox this morning but could have.

How do I fix and at the same time retain my bookmarks an other information from 118.0 I have a different version an older version Firefox installed on my computer (115.0.2) which I only use for google voice - I am using this installation to ask this question.

Thanks,