I-Firefox Community Forum

How do you avoid/deal with Firefox website incompatibilities? This happened on consecutive visits to two different websites today before I posted here.

In the first one, I disabled Ublock, cleared cache and cookies, and the site loaded, I then enabled Ublock with no error prompted.

Then I got a tab crash on Youtube. I wouldn't call tab crashes a daily occurrence for me, but I'm accustomed to them

Gmail tab crash just now. It just happened now with another website tab crash. i'm reverting back to 147.01

Is there any way to get the root of this. The only recent changes I can think of are browser (147.0.2 yesterday) and addon updates. Should I post my list of addons?

I’m seeing a layout and font spacing issue in Firefox that doesn’t appear in Chrome or Edge. The page loads, but some elements shift after render and text spacing looks off.

I’ve tested in a private window, disabled extensions, and cleared cache, so it doesn’t seem profile-related. Any suggestions on what Firefox settings or DevTools checks might help?

Page where the issue is reproducible: dbrosmenu.com Thanks.

They play for a couple of seconds, then the panel they are playing in goes black. They used to work a month or two ago. Videos play fine in YouTube. They also play fine in apps like VideoPlayer and VLC. They play fine in Chromium based browsers Opera, Brave and Vivaldi. My graphics card requires switching acceleration off. I can’t find a switch for that in Firefox.

Problem Videos start playing, then after a few seconds the video panel turns black. Audio may continue. Refreshing does not help.

Environment

   OS: Fedora Linux 43
   Firefox 147.0.1 (also tested Firefox Flatpak)
   Display server: Wayland and X11 (both tested)
   Hardware acceleration: on and off (tested)
   Media Source Extensions: enabled (disabling MSE triggers an “unsupported device” error)

What works

   BBC News videos play correctly in Chromium-based browsers (Brave, Vivaldi)
   Videos play correctly in mpv/VLC
   Other video sites (e.g., YouTube) play correctly in Firefox

What I’ve tried in Firefox

   Disabling hardware acceleration
   Disabling VA-API
   Disabling WebRender
   Disabling RDD sandbox
   Running Firefox under X11
   Using the Firefox Flatpak build

None of these measures help. This suggests the issue is related to Firefox’s interaction with BBC’s player on Linux. Has anyone else seen this, or is there a known workaround?

Dear Helper,

since the newest Firefox update, i got today (16.09.25), the audible cloudplayer doesnt work anymore, meaning it wont load the audiobook! I emptied the cache, but nothing changed. I tried the audible cloudplayer with Windows Edge and it works fine, so it is a Firefox specific problem. I granted all websides access to audio and media automatic replay, nothing changed. The cloudplayer doesnt work! So my question is: What else is interfering in Firefox with the loading of the player? Thank you so much in advance for your help :) Yours sincerely David

While playing chess at lichess.org, browser power management inhibit messaging to the system gets stuck on its current status. That is, if power management is inhibited by media playing on another tab while I play a game, it will get stuck in the inhibited state. If power management is uninhibited while I play (no media playing), it will get stuck in the uninhibited state. This persists until the browser is restarted even if all tabs are closed.

I don't believe it to be a system issue, as the problem clears as soon as the browser is closed. Chrome based browsers do not exhibit the behavior for me, but I tried a Firefox fork (LibreWolf) and it has the same issue. I don't experience this issue at any other website I visit.

Only certain areas of lichess.org cause this behavior, primarily playing a game against a human opponent. I tried progressively blocking media and script requests to narrow down offenders, but I always break site functionality before I can pinpoint anything.

I'm not so much looking for a solution (although that would be great) as I am troubleshooting advice. Is there any way to narrow down exactly what it is about this specific website that is causing the issue?

I have been unable to log into my email provider from their home page https://mailbox.org/en/ using Firefox. There is a progressive web app that "goes with" Firefox (if that is the right term) and that does not seem to work either. I get blank screens. I have succeeded in logging into mailbox.org in Microsoft Edge and in Brave. Can you please give me any clues as to what settings or whatever I need to configure in Firefox to be able to log into mailbox.org ?

I am unable to log into my Microsoft account normally. After entering my username and password, when I should be prompted to enter the two-step verification code, the webpage only displays the message: "Please retry with a different device or other authentication method to sign in. For more details, please see this link."

To resolve this issue, I launched Firefox using the -P command to access the Profile Manager, deleted my existing profile, and created a new blank profile. After logging into the new profile, I first signed into my Mozilla Firefox account to reload all my bookmarks. Without waiting for the synchronization of bookmarks and extensions to complete, I immediately visited account.microsoft.com and attempted to log into my Microsoft account, but the issue persisted.

Strangely, I opened a new private window and was able to successfully log into my Microsoft account through it.

Moved from Windows to Mac and now facing this issue, so it seems to be a Firefox + Mac OS compatibility issue.

Have turned on screen recording permissions in Mac settings and some other accessibility permissions that have been suggested and nothing helps.

Will need to use a different browser just to screen share.

a web site continues to say mozilla browser need update to correctly access web page. I have downloaded latest update ESR for Firebox (using windows 7 OS) But web site still says I need update! Is it me or the web site that has the problem?

Hello, I do not know if others have this problem, but when I try to access an Microsoft email account, using Firefox, it loads and then immediately logs me out. When I use a Firefox Private Window, this not occur. What might be causing this?

firefox is keeping me from accessing certain sites. why. do i need to switch to safari to access the sites. they do load on safari. can it be fixed or do i need to change?

When I could still connect to IMDb with Firefox I had other problems: Many of the links within IMDb did not work. In Google Chrome everything works like it should, though.

Practice page in freecodecamp.com is not appearing. I have tried all the help articles but it is not resolving. I have attached screen shot also. There is data above the marker I have put. It is not going up. Please help

I find that many websites don't run on firefox. Examples are virgin atlantic, holiday autos and copa airlines. I have to switch to Chrome to use them. Considering that firefox releases updates frequently this situation is surprising. Is the firefox administration aware of this issue? Is there any way to overcome this problem?

Dans free.tv pourquoi la suppression des sous-titres ne fonctionne pas problème Mozilla ou Free.tv ?

Hello,

The fonts are not rendering properly on few websites, example(apnetv.xyz), everything was working fine with stable release of v146.

The beta versions were having the same issue, i assumed it was related to Beta releases, so I switched back to stable one. However now firefox has released stable v147, the issue persists. Kindly fix it.

Regards, 4hm3d

This image is one of a series of similar messages I get. Incredibly, this has even after a 2-step verification is competed.

I have no problem with Yahoo in Chrome. No problem with the Yahoo email mobile app.

I am not a Chrome fan, but It is not unusual for me to have to use Chrome to avoid random website behavior issues with Firefox.

Firefox has always had problems processing forms. Not every time, just once in a while and that can be so infrequent that I don't see the browser being the issue until I contact support at the company whose site I'm having issues with. This could be processing a checkout form on a site after purchasing an item. This latest incident involves me trying to fill out an open enrollment form for benefits at the 3rd party benefits administrator because I got fired in Nov [along with many others]. I tried to fill out the re enrollment form and it simply went in circles and never completed. The name of the benefits administrator is "bswift" if that makes any difference. You know what they told me when I called and said I was using Firefox? "Well... you should be using Chrome or Edge." Doesn't happen often, but companies know there is a problem with Firefox. In that case, why are there ZERO help articles on this site on the issues of forms? I tried phrasing the question 5 different ways. The last one gave "Found 52 results for ‘forms don't work’ for ‘All Products’ ". If the companies that I call know that Firefox is an issue, and this has been going on for a LONG time, years, then why has this not been addressed? Either by Mozilla, or by someone in the Forums? Not a single one of the 52 results were even close to my issue. I am simply at a lost to understand why I am the only one in the world forms don't work for. I have to stop, move to Chrome, and start whatever it was I was doing all over again. I have been using this product since Netscape 1.0, and was around long before windows or browsers existed. Any insights are appreciated. Thank you.