Firefox Community Forum

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

I am using Firefox on Windows 11, in the process of switching from Chrome.

I run Cockpit (https://cockpit-project.org/) on web servers that I manage, and when I log into it on Firefox the screen flickers constantly, making it unusable.

There is no issue with any other web sites I have visited, and I can still use Cockpit when in Chrome. So ay suggestions on how to troubleshoot and resolve the issue with Cockpit and Firefox?

In the last few weeks, i cannot read my iCloud emails. It says things like"message cannot be downloaded now" or "cannot move to trash now", so the only way I can consistently read my emails, is to switch to my Google browser, which has absolutely no problem with the iCloud emails Why would this be happening?

          Jonathan Rahn

My password manager up until very recently let me sign into Rogers, the largest internet & webmail provider in Canada. Now the page does not fully come up, allowing one to sign in. Refreshing, rebooting & clearing cache helps not at all. It does work fine in edge however. It's an issue on your end.

Many websites that I use regularly, such as Zillow, no longer work correctly in Firefox ESR (115.33.0). The top menu in Zillow disappeared this week. Others work, but all the text is greyed-out. All except the text thing seem related to Javascript features. For instance, check boxes on a Wordpress site that I manage quit working last month. Some, like www.RCgroups.com just sit and spin, and never fully open up.

But they all work fine on an old copy of Chrome (109.0.5414.120), that is no longer supported on Windows 7 and hasn't been updated in probably 3 years.

My only plugin is NoScript, but the problem is the same whether it's turned off or not. And I also use NoScript on Chrome.

I use Win7 for the same reason I use Firefox -- it is safer, far more stable, faster, and it doesn't force updates on me that invariably break things. I appreciate that Mozilla has extended support for the last stable version of Windows. But somebody should look into this growing compatibility issue.

I can access my credit union using firefox on my phone, or even this computer when using MSN. I can NOT reach my credit union on this computer using firefox. I get a 403 forbidden message.

Couple of updates back, Firefox quit working as before on a particular webpage. See attached images. Describing the webpage, this is from an embedded server on a Burk Arc Solo radio transmitter monitoring and control system. Accessing the webpage allows control over the transmitters in addition to getting readings on the performance of the units. The Edge browser shows how it's supposed to look, meter names and data values, they self refresh and show changes dynamically. Why is the Firefox no longer doing this? Note: this is at a remote site using remote desktop to access the machine watching the Burk. The machine is Windows 11.

When I try to log into Tangerine bank I get the error. "We're sorry for the inconvenience. This function is currently unavailable. Please try again later."

This issue started Oct-13-2025 and it appears to work when using Firefox ESR 146.01 but not the regular Firefox 146.01 versions. Tangerine is not giving me information on the error and I was wondering if there is a difference between the ESR and regular version that might clear up this issue?

Gentili Signori, Sempre più spesso, quando si aprono le pagine di pagamento online, il browser non è più in grado di visualizzare correttamente la selezione dei metodi di pagamento o il layout complessivo della schermata di checkout. Questo sta diventando piuttosto frustrante, dato che sono un fedele utente di Firefox da molti anni. Tuttavia, questo problema mi sta spingendo a scegliere un browser che funzioni davvero, come Google Chrome, cosa che trovo piuttosto fastidiosa. Ci sono chiaramente aggiornamenti mancanti e lacune tecniche che stanno diventando sempre più profonde e evidenti, il che mi porta a credere che il vostro progetto non venga più aggiornato con la costanza che dovrebbe avere. Ciò è particolarmente preoccupante considerando che il vostro cliente più importante è proprio Google, che vi paga per rimanere in vita. Grazie.

bold textI have created a new profile, uninstalled Firefox and reinstalled, flushed the DNS, always deleted cookies et al on closing. When I try and sign on I get a msg saying site unavailable, but when I go to the laptop sign on without any problems. Also on my desktop if I use Edge to logon to the site I am successful.

I can't always sign into my bank with Firefox but can with Safari. Sometime it works and other times it doesn't and I get an error message. If I switch to Safari, I never have a problem signing in. Can you tell me what's going on and how to fix it?

Also, I can't do health video calls with Firefox. I can see the person but they can't hear me. I've tried everything I know to do the get it working to no avail. However, if I do a Zoom teleconference, I generally don't have any problems. The problems come when my doctor's facility sets up the video call. I don't know what system they use, but it's odd that it only works partially (video and no sound). I can do the video calls on my cell phone with no problems. It's only with my desktop, which I prefer to use because the screen is much easier to view. Any ideas on how to fix this problem?

Thank you, Deborah Higgins dlhig33@yahoo.com

Ce matin,09/03, ORANGE a mis en place une nouvelle messagerie qui ne passe plus sur FIREFOX mais que j'ai retrouvée par un autre navigateur. Tous mes contacts avaient disparu ainsi que les messages reçus ou envoyés.

I cannot log into Facebook with my Firefox browser. Even though the username and password are entered correctly, the login freezes and I cannot proceed. I am able to access the site on other devices. On my laptop, I deleted all cookies, history, and cache as recommended. I am able to log in to Instagram on this device. Coincidental to this problem: when I try to view video on newyorktimes.com, the browser freezes. I cannot view content in other open tabs and must reboot the browser.

I have emptied cache, reset everything and I still get

Access Denied You don't have permission to access "http://www.cabelas.com/home" on this server.

Reference #18.cdd11102.1773077261.fdc87252

https://errors.edgesuite.net/18.cdd11102.1773077261.fdc87252

This is from Cabelas.com but I am getting it more and more from other web sites. American Airlines, Delta.com, etc. I accessed the help and did all the steps about fingerprinting and turning off "enhanced tracking protection" and nothing helps. Any ideas? Don't like the idea of using Chrome or Edge, but Firefox is almost unusable for me now. If I have to keep using another browser for the sites, may as well just use that one only.

Using Facebook creates an "Isolated Web Content" which makes the page run slow then crash.

This has been happening for years, now and means I increasingly just don't use Firefox, switching to Chrome, instead.

This affects Facebook on my Mac (Sequoia) and PC (Windows 11) machines.

When I try to connect to www.qsuper.qld.gov.au, I get this message:

"Pardon Our Interruption

As you were browsing something about your browser made us think you were a bot. There are a few reasons this might happen:

   You're a power user moving through this website with super-human speed.
   You've disabled cookies in your web browser.
   A third-party browser plugin, such as Ghostery or NoScript, is preventing JavaScript from running. Additional information is available in this support article.

To regain access, please make sure that cookies and JavaScript are enabled before reloading the page."

I have checked that javascript is enabled and I do not have Ghostery or NoScript plugins. Interesting, the "support article" was hyperlinked and I could not access that either. (https://ds.tl/help-third-party-plugins, and the message is"server not found") I have rung Qsuper who advise me that there website is fine. Please advise any strategies. Many thanks in anticipation.

I use Firefox on a Mac to access Brightspace for my classes. I also use Grammarly. When copying text from the Grammarly widgets and pasting it into the Brightspace HTML editor, the text is stripped of hard returns, causing paragraphs to collapse without any breaks between them.

I have tried pasting as unformatted text, and the issue persists. This issue does not occur in Chrome, so I suspect it is due to how Firefox handles clipboard data. I have not found a workaround or resolution for this.

With dailyexpress.co.uk using Firefox there are two pop ups. One is breaking news on each page using right links and the other is a subscribe to read any of the site, which is recent but prevents reading the site. This does not happen using Microsoft Edge.