Firefox Support Forum

I run Firefox Developer Edition.

I recently added some lines to my hosts file (C:\Windows\System32\drivers\etc\hosts). Despite these additions, Firefox ignored the hosts file and loaded the pages I had blocked just fine. So I tried a multitude of options like disabling "Enable DNS over HTTPS" and eventually I got to work and the hosts file was respected.

So after thinking about it for awhile, I actually DO want Firefox to ignore the hosts file like it did before I made the change. I reverted the "Enable DNS over HTTPS" setting to its default of enabled, and I've tried everything else I can think of, but I just can't get it to work.

How can I configure Firefox to ignore the system HOSTS file and load blocked pages anyway?

Could really use some help.

Hello, We are developing an extension which is built on manifest v3. Right now in the firefox MV3 is not available by default and user has to enable it manually. I wanted to understand the timeline for the MV3 release. So that we can decide to support MV2 or not in our extension

Hello. I use developer's version of ff for a few weeks (currently on 107.0b2). I recently decided to switch back to stable version 106. However, when I run it it says

``` Using an older version of Firefox can corrupt bookmarks and browsing history already saved to an existing Firefox profile. To protect your information, create a new profile for this installation of Firefox. ```

So, how do I move from developer's version back to stable without losing anything?

(OS: debian 11, if it matters)

I have Firefox 107.0b5 (64-bits) Snap for Ubuntu canonical-002 - 1.0 I use Ubuntu Mainline to update to newer kernels. Never had any problem doing that. I am now on 5.19.15. But when I upgrade to kernel 6 (which is now at 6.0.5) Firefox tabs crash. Reloading doesn't help. Each new tab I open gives the same crash message. I have to restart to get Firefox going again. So I removed kernel 6 and reverted back to kernel 5.19 and have no problems any more. But question, what is the problem between kernel 6 and firefox? Does anybody else experience this problem?

I have no other problems with kernel 6 with other programs or hardware or whatever, only firefox tabs crash...

Every time I work on the local environment a lot of my extensions go crazy on localhost, throwing enormous amount of errors. This makes console barely readable. Is there a way to disable messages thrown by extensions in the developer tools of Firefox Developer Edition?

Similar to this in Chrome with "Selected context only": https://superuser.com/a/1346827

Thanks.

I have a laptop with Ubuntu 22.04. Firefox 307 from deb package works perfect. I wanted to give a try to Flatpak variant 306, which works well too, except two finger gestures back and front won't work. Scroll works. Any scheduled fix for that? Would be cool to move to flatpack completely.

I've recently been having troubles playing videos on Firefox.

My school website uses Vimeo embeds, but recently when I've put the videos in fullscreen, after 4-5 seconds it stops responding. The video freezes but the audio continues, and the controls don't come up when I move the mouse. I can press ESC to exit fullscreen, but the controls are still gone and the audio keeps playing. Then after a few more seconds I get the warning "This page is slowing down Firefox, to speed up your browser stop this page".

If I don't use fullscreen but instead zoom in on the page, it also freezes. If I try the same things with Edge it does not freeze. I also made sure that it was only affecting Vimeo videos, by testing with other platforms and other vimeo links.

I found previous reports of this issue, but all of them were either on Linux, or it was an issue with flash player, which is not relevant anymore.

Not quite sure how to debug this but I would be happy to provide further info. It's really important that it works again :/ Thanks in advance!

My repro steps: 1. Find a video on https://vimeo.com/watch 2. Play it and enter fullscreen 3. Wait around 6 seconds

I'm having an issue where firefox is acting as if there's something blocking pages/content. I do not experience the issue on any other browser.

I first noticed it trying to log into one of my accounts. The login portal redirects the page to a success screen and then to the home page. With firefox after entering credentials it shows a blank page with a 500 error instead.More specifically I believe it has to do with an api for "duosecure" (checking for multi factor auth)

another example is trying to download chrome remote desktop - normally you click their download link and pauses the current page while it triggers a popup to chrome's page to download the extension. It does this in any other browser I try except firefox.

This is on a clean install of windows 10 and a clean install of firefox. I am on the latest version of firefox (tried 106 and updated to 107 via the beta options) I have: - cleared cookies and cache - restarted firefox - tried safe mode - tried with and without extensions/addons and have removed all - uninstalled firefox as well as deleted all appdata folders - tried unchecking hardware acceleration - setting dns to none and changing the dns server options - turned off any setting i could find regarding popups, blocking sites etc - manually turned off enhanced tracking - gone through windows firewall and security settings to turn off everything that i could find that was "on" - rebooted computer - rebooted router - used the "refresh" firefox to set it back to defaults - tried connecting to the internet via ethernet and wifi options - windows updates Note: logging into other things such as gmail or facebook are fine on firefox but they don't seem to trigger redirects to outside sites.

Tell me how to configure profile chooser to not show profile location when mouse hovers over it for 2 seconds, make the time necessary to show profile location 10 seconds, or disable the showing of profile location when hovering over profile in chooser.

Lately every time you release an update you break something in how Amazon is displayed. Not on all pages, the initial main page is fine, but if you try and view any lists or past purchases the display is unreadable. I've noticed this in the past, but this time it happened right after your last update, so I conclude that's where the problem lies. The attached screenshot is of my Amazon Wishlist. If you have one of those you'll notice the appreaence is way off. And BTW I was trying to delete the list, or perform any of the other actions that result in those warnings. Thank you.

Hello.

It seems I get a problem or two almost always with a new update lately. I have been using an userChrome.css to reduce the width of sidebar but the latest version 107.0 now ignores it and have a wide width even at the narrowest. Mine currently is set as, "#sidebar {min-width:30px !important; max-width:none !important;}" This no longer works. Your support much appreciated.

Regards,

So I downloaded Firefox and logged in expecting my bookmarks to carry over after I "sync'd" it, however the did not. So I went to my old pc and did the export bookmarks thing and imported it to the new pc.

Now.. I have all my bookmarks and everything appears great. Except whenever I open a link from say my work it opens a Mozilla window that doesn't have my bookmarks. When I try to combine the windows It doesn't let me. I am also scared of losing access to the Mozilla with my bookmarks as I work from home using those. (the desktop shortcut to Mozilla opens the one without all my work)

In the attached screenshot things to note, the bookmark bar available on left isn't there on the right. Additionally in the taskbar (bottom) it shows Mozilla in two distinctly separate icons. When two Mozilla windows are open, they share the same icon on the taskbar, these do not, which leads me to believe I have two incompatible versions existing next to each other.

Hi, My 2019 16" MacPro crashed when I downloaded the new Ventura OS. Only fix, per Apple, was to wipe the disk clean and reload the OS (Ventura 13.0.1). I reloaded and I lost my Firefoz and all the bookmarks I had. I need to retrieve them. How do I do that?

Ever since I loaded version yesterday Firefox periodically crashes when undertaking normal functions. For example I will load a set of tabs that i have been loading for years and now doing so causes a crash. Worse still of the 8 to 10 crashes I have experienced in the last 24 hours only 2 are recorded on the "about:crashes" feature and one of those fails when you attempt to submit it.

Now this has only started hapening since I upgraded to version 107. It is clearly somerthing to do with that update and the only further thing I can think to do is a full reboot in case some rogue process is interfering with the new version.

NB Please note I'm not interested in excuses about add-ons and the rest being the problem. it was this update that has destabilised my browser. Your Update. Your problem. Own it.

Regards Anona

Whenever i start typing a "g" in the address bar, Google is recommended first. I would prefer for it to be something i commonly search for starting with g, but I can't seem to remove it. Using the usual shift+del doesn't remove it for some reason.

Thanks!

I have 3 PCs with Firefox. The bookmarks and bookmarks toolbars were all synced but one machine required re-installation, and now I have a fresh Firefox and have forgotten how to import the bookmarks and bookmarks toolbars. I don't seem to have any password for Firefox sync and I can't find where and how to import the bookmarks. Can anyone help?

I am blocked from my account on PJMedia. PJ says the problem seems to be with Firefox since I can get in using Chrome. This is the message the mail system returns: Undeliverable: Delivery Status Notification (Failure) Mail Delivery Subsystem <mailer-daemon@googlemail.com> You Message blocked Your message to pjmediavip@townhallmedia.com has been blocked. See technical details below for more information. The response was:

Message bounced due to organizational settings.

Any suggestions? PJ seems unable to resolve the issue.

My problem is a new issue with Firefox and CenturyLink. I tried chatting with Century Link and they keep referring me to Firefox so here is the issue. In October I was able to log in to Century Link and view/download my current bill. This month when I try to view the bill all I get is a grey screen and no data. I have been forced to use Microsoft Edge which DOES allow me to view/download the bill. Also, the Chat feature on Century Link via Firefox does not work. It does work in Microsoft Edge. Something in Firefox changed in the past month and I haven't a clue what it is.