Firefox Community Forum

I cannot connect with my on-line banking site. When I try, I get the 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 able to access the site using another browser, so there cannot be a problem with the site itself. This situation has only existed since Firefox did an update. So, the problem must lie with Firefox. If it is not fixed, then I fear that I will have to discontinue using Firefox as my online browser. Please have someone from technical support contact me. [edited email from community support forum]

I teach an online Adobe Illustrator Course. Students upload (.ai) Adobe Illustrator files. Not .svg or .pdf. But Firefox changes the (.ai) extension to (.pdf) upon downloading. This is HIGHLY irritating. Firefox, in prior versions, did not do this. In Firefox settings for Applications, there isn't a choice for .ai (Adobe Illustrator) files. I 'assume' that when AI (artificial intelligence) became available is when Firefox began automatically changing (.ai) files to (.pdf). PLEASE SOLVE this as I have to manually change the (.pdf) extension BACK to (.ai) HUNDREDS of times a day.

Professor Brian Sauriol

Hello,

When I try to visit a specific journal site that requires authentication, the browser automatically redirects me to an authentication page that I have used before. This is very annoying because every time I click a link to the journal, I’m sent to the other portal and can’t access the article. I want to stress that I haven’t installed any add‑on that would cause this redirection. I think I did that myself manually but I have no idea how. I’ve already deleted the cookies for both sites, but nothing has changed. I hope that makes sense, it’s a bit difficult to explain.

I'm using firefox 147.0, on mac Tahoe 26.2.

Thanks for the help !

hi, I love supporting this independent browser - I know its not perfect but it does a great job of doing most things well.

However, and there is a big but. I can be in the middle of an investigation that requires sharing data to a new tab - on opening the tab I'm blocked from going further as Firefox needs to do an update! This is really infuriating. No update can be SO urgent that you stop me using the browser. This is the Microsoft mentality, and its wrong. Can you please investigate NOT forcing users to update their browser during session.

Matt.

I'm afraid I picked up malware despite Sophos due to this message upon routine searches, e.g. "Where's the nearest pet store". About this page Our systems have detected unusual traffic from your computer network. This page checks to see if it's really you sending the requests, and not a robot. Why did this happen? IP address: 206.194.252.88 Time: 2026-01-13T22:42:41Z URL: https://www.google.com/search?q=Pettstores+near+33069&ud m=14&sei=YMpmafbPMZyKwbkPzc23sAE

It's preceded by the reCaptcha request to check the box stating I'm not a robot.

I'm afraid to enter any passwords on here, to order anything, and especially engage in banking. I'm in a rental using WiFi, Thank You, Eileen

In `about:config` I set `mousewheel.with_control.action: 3` quite a while ago, and today, after an update it stopped working. Current version: `146.0.1 (aarch64)`. Any idea why?

When I go to (seemingly) any Elsevier site, the browser tab immediately closes with no error or explanation. An example is this site:

https://www.sciencedirect.com/science/article/pii/0167508784900164

My instagram does not open on my firefox browser. I have cleard all the cookies and cashes. I tried Incongnito, hot spot sharing. I have tried everything its still not working. Can you help me?

With the latest update, some of the shortcuts that appear when I click on the address bar have changed. Now several of them are for websites that I don't use on a regular basis. Is there any way to remove them? Is there any way to add back shortcuts for sites that I do use on a regular basis?

Using Safari and Apple's Mail app on iMac. I have multiple desktops with some Firefox pages open in some of them. If I click a link in an email from desktop that does not currently have an open Firefox window, Firefox does open a new window on that desktop but instead of giving it the focus, the focus jumps to whichever Firefox window on another desktop most recently had the focus. If I use the keyboard shortcut Cmd-Tab to return to the Mail and then Cmd-Tab again to switch back to Firefox, Firefox then gives the focus to the newly opened window on that desktop. This is annoying and seems like a bug.

Thanks,

 Mel S.

How do I get help if the community does not respond??

I've asked for help several times, but have had no responses. Everything appears in English in Firefox, as I would hope - except my bookmarks. I have tried all the settings, and all of the resets, and have even deleted the app and replaced it on my Macbook Pro. Nothing changes.

Help

I'm on a Mac using Mac OS Big Sur, 11.7.10.

Videos will not play on Firefox, whether on Youtube, in social media, on websites, or whatever. Sometimes the video will play with no audio, sometimes I just getting a rolling wheel.

I have other functionality issues that may be related.

I don't want to close and restart all the time. I am considering changing to a new default browser over the issue.

If I switch to Chrome or Safari, the videos play fine. Which seems like my answer.

My firefox will not connect properly with the Bing Home page. It often provides a message "cannot connect" and when I click on that, it does. But yesterday, when I did that, all that came up was a screen with just a solid colour and the search bar on it. I used my Safari browser to access Bing, but I don't like using Safari. So, would like a fiz...

Hello, in the last couple of days I spent a lot of time deleting old accounts stored in "passwords" in my Firefox account and making sure no vulnerable passwords were still around. I did it from my Mozilla account, on a laptop.

When I was done with it, I signed out from my account on my Android Firefox app, and deleted all the cache and the data, to remove all the old password. Unfortunately, when I looged back in my Firefox account, the old passwords were still there and synced on my laptop as well.

So, is there any way I can undo that Sync? The problem is that now not only all my cleaning pointless, but I changed the password for many accounts and the Sync override it with the old ones.