I-Firefox Community Forum

When I try to change the wallpaper in WhatsApp, Firefox freezes completely. I have Windows 11 Home 25H2 on a Dell Ultra 9 PC with 64GB RAM.

I've taken these measures without success:

1. Logged out of WhatsApp.
2. Deleted cookies & browser cache.
3. Logged into WhatsApp.
4. Tried Troubleshoot mode.

This issue doesn't happen in Chrome or Edge. WhatsApp Support had no further advice to give.

Kind regards Gummo

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'm using Windows 11 with the latest version of Firefox.

A few days ago I went to addictinggames.com and had no problem playing several games. Today I went there and every game I tried I received the following error "Application error: a client-side exception has occurred (see the browser console for more information)."

Then I went to the site using Microsoft Edge and had no problems, every game I tried worked fine.

In Firefox I disabled both Adblocker Ultimate and Ghostery (My only extensions). Before I went to the site I deleted cookies and Temporary Internet Files and I still got the same error. Any ideas?

Lately when I go to facebook, I am confronted with captchas to prove I am not a robot. However I keep doing them and keep getting another one. The last time I gave up at about 20.

Meanwhile when I go to f/b on microsoft edge I get in immediately.

Whats the scoop

The past 2 days When watching Peacock, after a commercial is done it freezes but yet the show is back on. Only way to watch the show is to move the mouse after all commercials. So this is new. I watched peacock on EDGE, no glitches. I checked my speed test...all is good. Frustrating, i'm used to firefox....so FIREFOX is not compatible to Peacock. and i installed Firefox again since it was running slow, crashing glitches,& non responsive...

TODAY BEGAN HAVING PROBLEMS OPENING PAGES BEYOND HOMEPAGE. SEE ATTACHED IMAGE. HOMEPAGE LOADS LOADS NORMALLY BUT LINKS WITHIN HOMEPAGE DISPLAY ACCESS DENIED. WITH OR WITHOUT ENHANCED PROTECTION. PROBLEM SITES: COSTCO, HOME DEPOT, LOWES ETC. OTHER WEBSITES WORK NORMALLY. I CANT EVEN SEND AN ERROR REPORT WITHIN FIREFOX (THERE WAS AN ERROR SENDING THE REPORT. PLEASE TRY AGAIN LATER DISPLAYED. (SEE IMAGE) WHAT THE HECK IS GOING ON? BEFORE TODAY NEVER HAD THIS ISSUE. FIREFOX DESKTOP 115.32.1 ESR WIN7 64

The most recent update has caused an issue with LinkedIn. The problem only occurs with Firefox, not with Chrome or Edge. Do you know what it is? How to fix it? The profile photos are being overwritten with the name of the person and title.

Just recently when logged onto Hotcopper.com.au have been getting a message that reads "This page is slowing Firefox down. To speed up this browser, stop this page." There is a STOP button, that helps for a moment or two only. When I open the program with MS Edge, the problem does nor occur. I was going to remove the Firefox App but saw the repair option. Repairing did not stop the problem. Any suggestions? John I have a near new Acer laptop running Win 11.

Since your last update on 13th Feb 2026, we have not been able to receive any emails on the computer. All phones and iPads do ! We keep seeing "Captcha " requesting us to match items, etc., then when we do and get them all right, it pops up a message "Oops, Something went wrong." Our Wi-Fi provider, Spark.co.nz, suggested that Firefox has something like a firewall stopping the emails from coming through. Your thoughts or comments would be appreciated. We have used other "Browsers" which allow them to do so, but would rather have Mozilla Firefox, which gives us no problem whatsoever with all other Apps and Websites.

Kind Regards.

Ray (Retired Engineer)

When using Firefox to access certain sites on this laptop such as Marriott.com, United.com, AA.com and Spirit.com, after I login and start a search I get an Access Denied message. However, when using Firefox on another laptop I am able to d a search for a reservation on these sites. This leads me to believe a setting on this specific machine has been changed and I do not know how to correct the situation.

Access to the above sites works without any issues on Chrome or Edge.

Re-occuring Captcha message when i attempt to sign into Facebook. .. 3 days now .... why ??

I have cleared cache. - history - ran virus and malware scans. ... nothing works to stop this Captcha thing

Hi Firefox support,

I’m experiencing a persistent issue with Google Fonts (.woff2) on Windows 10. Only on some but not all pages whoch are using Google Font woff2: Fonts display correctly after starting Firefox, but as soon as I reload the pages with for the first time, they appear corrupted and remain broken. Private Browsing mode renders the fonts correctly, and Chrome does not have this problem.

Below is a detailed list of everything I’ve tried with ChatGPT so far to troubleshoot the issue.

(OS: latest Windows 10)

Browser: Firefox (freshly installed, no sync)

Behavior:

Example site: https://www.linguee.de/

Steps already attempted:

Disabled all extensions

Tested in Firefox Safe Mode / Troubleshoot Mode

Created a new Firefox profile

Fresh Firefox installation without signing in

Deleted all relevant caches:

%LOCALAPPDATA%\Mozilla\Firefox\Profiles\<profile>\cache2

%LOCALAPPDATA%\Mozilla\Firefox\Profiles\<profile>\storage

%APPDATA%\Mozilla\Firefox\Profiles\<profile>\startupCache

%LOCALAPPDATA%\Mozilla\

Verified / adjusted Firefox config in about:config:

browser.display.use_document_fonts = 1

gfx.webrender.all = false

WebRender running in WebRender (Software) mode

privacy.resistFingerprinting = false

browser.cache.disk.enable = false

network.http.rcwn.enabled = false

accessibility.force_disabled = 1

Disabled hardware acceleration for testing

Tested DirectWrite / Direct3D settings

Recalibrated ClearType

Ran sfc /scannow to repair system fonts

Temporarily disabled antivirus / web protection

Tested behavior in private mode versus normal mode

Observed that hard reload (Ctrl + F5) does not fix fonts

Noted that only .woff2 (Google Fonts) are affected; system fonts render normally

Summary:

Issue is not caused by extensions, profile, cache, or a fresh install

Private Browsing works → problem is related to persistent normal-mode caching or rendering

Only occurs in normal windows, consistently reproducible after first reload

Problem seems specific to .woff2 font handling and Firefox’s rendering pipeline on Windows 10

For the past week everytime i use the search whether by using the address bar or context highlight a word i get a blank page as first result, if i search again i get the result. I use yahoo search engine as my main search engine for the past 10+ years. This doesnt happen if i set the google engine as i tested it in case it was an search engine issue.

...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 have no issue with youtube on any other browser, but I do prefer Firefox. However, Fierfox says that site is slowing down firefox and suggests I close that page. Firefox did not do this in the past. Is this similar to the rather ugly color of the private window that I can't change, not being a coder? The impression I get is that Mozilla is making changes without assuring they work properly. I currently have to use chrome to make sure youtube works correctly.