Firefox Support Forum

For a long time I've used Firefox on Linux with multiple instances each with their own profile folder. Today when I try to run these instances with separate profile folders I get the following error:

> Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile.

Profiles are created like this:

firefox --new-instance --createprofile "PROFILENAME ~/.firefox-PROFILENAME"

They are run like this:

firefox --new-instance --profile "~/.firefox-PROFILENAME"

It seems something has broken with the instance isolation as this is now throwing an error. Additionally I run "createprofile" it doesn't seem to actually create the folder.

I am using Linux Mint with Firefox 127.0.2 (64-Bit)

In Preferences Applications, setting

 CSV-Dokument      to    open with firefox

opens edless new firefox Tabs - so I had to kill firefox. (setting CSV-Dokument to open with OpenOffice works fine. But this is not what I want.)

In Preferences Applications, I found further CSV types: application/csv-Typ CSV Document (application/text) CSV Document (octet/stream) CSV Document (application/x-download) Which applications should I use for them ?

I found the file "mimeTypes.rdf". However, I am not familiar with the syntax.

Every time I open Firefox after closing it, I get the message below. I can click the button to restore session and it works every time. With each update, I hope to never see this message again, but after installing a new version on Ubuntu today, I see the same familiar message. This is not linked to a computer, or an operating system because I've seen this on both Ubuntu and Mac. If Firefox could literally just click the button that would be awesome.

Sorry. We’re having trouble getting your pages back.

We are having trouble restoring your last browsing session. Select Restore Session to try again.

I am using Firefox 127 on Ubuntu.

When I press the Control key, I often lose focus in the window I am currently viewing. This is annoying as it prevents me from copy-pasting for example.

Sometimes the focus is back when I release Control, sometimes it is lost and I have to click again on the text field. It does not happen on all websites, for example support.mozilla.org works well, but it happens on duckduckgo or overleaf.

It does not seem to be the same as existing issues such as [the "show mouse when press Ctrl" of Ubuntu] (it is disabled) or an addon (the problem still happens in safe mode).

In case it is useful, when I press Control the tab bar background goes slightly darker, see attached images.

Thanks for your help :) Nicolas

I woke up this morning to my home directory having been remounted as read-only (it has its own dedicated hard drive at /dev/sdd1). I ran e2fsck and things looked good, so I restarted and things were fine again.

However, whenever I open Firefox, it hangs for about 1 full minute before it goes haywire and renders the entire system essentially unusable since being able to access my home directory is vital. The following is visible in dmesg:

[ 2710.362946] Aborting journal on device sdd1-8. [ 2710.363000] EXT4-fs warning (device sdd1): ext4_end_bio:343: I/O error 5 writing to inode 10520593 starting block 44134769) [ 2710.363008] Buffer I/O error on device sdd1, logical block 44134513 [ 2710.363041] EXT4-fs error (device sdd1): ext4_journal_check_start:84: comm glean.dispatche: Detected aborted journal [ 2710.363048] EXT4-fs warning (device sdd1): ext4_dx_find_entry:1795: inode #9718667: lblock 2: comm Renderer: error -5 reading directory block [ 2710.363076] EXT4-fs warning (device sdd1): htree_dirblock_to_tree:1082: inode #9701223: lblock 1: comm Cache2 I/O: error -5 reading directory block [ 2710.800016] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9976467: comm BgIOThr~ool #12: No space for directory leaf checksum. Please run e2fsck -D. [ 2710.812447] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9976467: comm Backgro~Pool #1: No space for directory leaf checksum. Please run e2fsck -D. [ 2710.884557] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9976467: comm Backgro~Pool #1: No space for directory leaf checksum. Please run e2fsck -D. [ 2710.980923] EXT4-fs (sdd1): Remounting filesystem read-only [ 2711.049635] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9701223: comm Cache2 I/O: No space for directory leaf checksum. Please run e2fsck -D. [ 2711.152739] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9701223: comm Cache2 I/O: No space for directory leaf checksum. Please run e2fsck -D. [ 2711.152757] EXT4-fs warning (device sdd1): ext4_dirblock_csum_verify:405: inode #9701223: comm Cache2 I/O: No space for directory leaf checksum. Please run e2fsck -D.

All other programs that I use daily do not cause this issue. No clue what to do here. LibreWolf works fine - that's what I'm using now that Firefox breaks everything and basically forces me to restart if I want to use my computer normally.

Dear friends,

I have Firefox Browser 127.0 (64-bit) installed. IFRAME is not displayed on some websites.

Example: https://www.rollerfreunde-untermain.de/gaeste.htm

Attached you will find a screen shot.

Can anyone say why this is the case?

Kind regards Uwe

Dear friends,

Firefox on Linux does not allow entries in forms that are called up in IFRAME. It works perfectly on Android.

Does anyone know why this is the case? Uwe

Firefox 127.0 (64-Bit)

Hi! I'm using Firefox 126.0 on Fedora 39.

Pages from Amazon.co.uk load very slowly, incompletely, or not at all. All other Web sites are fine.

I had a couple of certificate-related errors saying that the identity of the site couldn't be verified, but I can't reproduce the problem, so I can't quote the exact wording, I'm afraid.

The same Amazon pages load properly in Chrome on the same machine, and they load properly in Firefox in a VM on the same machine. That tells me network connectivity must be fine.

I've tried disabling all extensions, reverting to the default theme, running in Troubleshoot Mode, clearing cookies and site data, clearing the startup cache, disabling hardware acceleration, and creating a new profile. The new profile helps slightly, in that it loads more of the page before getting stuck. Nothing else helps at all.

I'd prefer not to refresh Firefox if I can avoid it, because I don't want to lose all my plugins and settings. This installation is five years old. Besides, a new profile didn't fix the problem.

What's the next thing to try? I'd really appreciate any ideas.

here is the video: https://streamable.com/zffknq the issue is about transparent bar with vertical addons and slowly fullscreen animation, and the fullscreen animation isn't config-able, I already set full-screen-api.transition-duration.enter 0 0 full-screen-api.transition-duration.leave 0 0 in about:config, and disable sidebar or userChrome is not work too. and this is happend about one mouth ago after my nixos update firefox.

I have a System 76 laptop running Ubuntu 14.04 LTS. The LTS (Long Term Support) ended years ago with Firefox 66. All of that works fine still. My problem is: 1. The world is telling me to upgrade my browser. 2. Mozilla tells me "Note: If you use your Linux distribution's packaged version of Firefox, you will need to wait for an updated package to be released to its package repository. This article only applies if you installed Firefox manually (without using your distribution's package manager)." 3. There will never be an updated package because LTS has ended. 4. IS THERE A WAY TO MANUALLY INSTALL A NEWER BROWSER LIKE FIREFOX 123?

FireFox assumes that text size is the same for all pages in a domain, rferl.org for example. That is _not_ true. If I have set size to 50% and then take a link to a page that's different and have to set size to 67% to read it, when I return to the original page, size is 67% and text is too large.

When I open Firefox and call up bing maps , it starts to load the page , then Firefox crashes . Has been doing this for several firefox versions . Looking at the crash report , I always get "The debug symbols are missing for firefox. Please install firefox-dbg." but I can't find firefox-dbg to load

A recent set of system updates appears to have made most website videos not play in Firefox.

When I inspect the Developer Tools - > Console tab the most detail Firefox gives are an error line similar to: Media resource URL could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006)

Internet searches for the error name and error hex do not appear yield any applicable troubleshooting, nor any methods of collecting additional problem data.

How can I obtain more detail on where the error is happening and how Firefox might be interacting with other packages present on my system?

Arch Linux has some older ffmpeg-compat packages, but those don't appear to match any of the web results, in that they're even older versions of ffmpeg.

yay -Ss ffmpeg-compat aur/ffmpeg-compat-55 2.3.6-4 (+24 0.00)

   Compatibility package for ffmpeg to provide versions 55 of libavcodec, libavdevice and libavformat, not anymore provided by the ffmpeg package

aur/ffmpeg-compat-54 1.2.12-4 (+87 0.00)

   Compatibility package for ffmpeg to provide versions 54 of libavcodec, libavdevice and libavformat, not anymore provided by the ffmpeg package

Hello, maybe someone else seen the same issue. When trying to establish a webrtc connection with the Firefox browser, my server sends a following message (video H264): ``` 0:00:01.701967159 90 0x7fc2a0002030 LOG webrtcsrc-signaller net/webrtc/src/signaller/imp.rs:172:gstrswebrtc::signaller::imp::Signaller::connect::{{closure}}::{{closure}}: Sending websocket message Peer(PeerMessage { session_id: "56a17f8d-2585-4d4b-9f2e-3009450a19e9", peer_message: Sdp(Offer { sdp: "v=0\r\no=- 9144757257615355393 0 IN IP4 0.0.0.0\r\ns=-\r\nt=0 0\r\na=ice-options:trickle\r\na=group:BUNDLE video0 audio1 application2\r\nm=video 9 UDP/TLS/RTP/SAVPF 96 98 99 100 101\r\nc=IN IP4 0.0.0.0\r\na=setup:actpass\r\na=ice-ufrag:uOJFtPAyRCKX4NDQcU3VExzLsFcfCWYc\r\na=ice-pwd:jRots1p0FnmxmwLoVqAq7lK84rAwBk/4\r\na=rtcp-mux\r\na=rtcp-rsize\r\na=sendonly\r\na=rtpmap:96 H264/90000\r\na=rtcp-fb:96 nack\r\na=rtcp-fb:96 nack pli\r\na=rtcp-fb:96 ccm fir\r\na=rtcp-fb:96 transport-cc\r\na=fmtp:96 packetization-mode=1;profile-level-id=42001f;level-asymmetry-allowed=1\r\na=rtpmap:98 red/90000\r\na=rtpmap:99 ulpfec/90000\r\na=rtpmap:100 rtx/90000\r\na=fmtp:100 apt=96\r\na=rtpmap:101 rtx/90000\r\na=fmtp:101 apt=98\r\na=ssrc-group:FID 2834502081 1415006916\r\na=ssrc:2834502081 msid:user1488703113@host-437c139 webrtctransceiver0\r\na=ssrc:2834502081 cname:user1488703113@host-437c139\r\na=ssrc:1415006916 msid:user1488703113@host-437c139 webrtctransceiver0\r\na=ssrc:1415006916 cname:user1488703113@host-437c139\r\na=mid:video0\r\na=fingerprint:sha-256 9E:33:DF:EB:63:72:42:77:49:8D:0C:0E:FC:61:51:C1:56:53:AF:05:D9:F7:61:8F:95:DD:7D:FF:99:1A:64:E8\r\na=rtcp-mux-only\r\nm=audio 0 UDP/TLS/RTP/SAVPF 97\r\nc=IN IP4 0.0.0.0\r\na=setup:actpass\r\na=ice-ufrag:uOJFtPAyRCKX4NDQcU3VExzLsFcfCWYc\r\na=ice-pwd:jRots1p0FnmxmwLoVqAq7lK84rAwBk/4\r\na=bundle-only\r\na=rtcp-mux\r\na=rtcp-rsize\r\na=sendonly\r\na=rtpmap:97 OPUS/48000/2\r\na=rtcp-fb:97 transport-cc\r\na=fmtp:97 sprop-stereo=1;sprop-maxcapturerate=48000\r\na=ssrc:1127273264 msid:user1488703113@host-437c139 webrtctransceiver1\r\na=ssrc:1127273264 cname:user1488703113@host-437c139\r\na=mid:audio1\r\na=fingerprint:sha-256 9E:33:DF:EB:63:72:42:77:49:8D:0C:0E:FC:61:51:C1:56:53:AF:05:D9:F7:61:8F:95:DD:7D:FF:99:1A:64:E8\r\na=rtcp-mux-only\r\nm=application 0 UDP/DTLS/SCTP webrtc-datachannel\r\nc=IN IP4 0.0.0.0\r\na=setup:actpass\r\na=ice-ufrag:uOJFtPAyRCKX4NDQcU3VExzLsFcfCWYc\r\na=ice-pwd:jRots1p0FnmxmwLoVqAq7lK84rAwBk/4\r\na=bundle-only\r\na=mid:application2\r\na=sctp-port:5000\r\na=fingerprint:sha-256 9E:33:DF:EB:63:72:42:77:49:8D:0C:0E:FC:61:51:C1:56:53:AF:05:D9:F7:61:8F:95:DD:7D:FF:99:1A:64:E8\r\n" }) }) ``` and Firefox responds with VP8 inactive message: ``` 0:00:02.007638187 90 0x7fc2a0002030 TRACE webrtcsrc-signaller net/webrtc/src/signaller/imp.rs:324:gstrswebrtc::signaller::imp::Signaller::handle_message:<GstWebRTCSignaller@0x563ce91ed190> Received message {"type": "peer", "sessionId": "56a17f8d-2585-4d4b-9f2e-3009450a19e9", "sdp": {"type": "answer", "sdp": "v=0\r\no=mozilla...THIS_IS_SDPARTA-99.0 2114996636650547664 0 IN IP4 0.0.0.0\r\ns=-\r\nt=0 0\r\na=sendrecv\r\na=fingerprint:sha-256 16:EC:66:ED:36:A1:D4:E0:CB:95:24:4A:E2:40:CA:53:E5:AB:D5:FF:F5:9C:5C:81:EB:83:F8:E4:BD:89:9F:03\r\na=ice-options:trickle\r\na=msid-semantic:WMS *\r\nm=video 0 UDP/TLS/RTP/SAVPF 120\r\nc=IN IP4 0.0.0.0\r\na=inactive\r\na=mid:video0\r\na=rtpmap:120 VP8/90000\r\nm=audio 9 UDP/TLS/RTP/SAVPF 97\r\nc=IN IP4 0.0.0.0\r\na=recvonly\r\na=fmtp:97 maxplaybackrate=48000;stereo=1;useinbandfec=1\r\na=ice-pwd:d5a493a07b92e452116a851e083e1c78\r\na=ice-ufrag:721f69a3\r\na=mid:audio1\r\na=rtcp-mux\r\na=rtpmap:97 opus/48000/2\r\na=setup:active\r\na=ssrc:3561002322 cname:{bb14ec44-0966-49c0-bccb-5e6242dd83d7}\r\nm=application 9 UDP/DTLS/SCTP webrtc-datachannel\r\nc=IN IP4 0.0.0.0\r\na=sendrecv\r\na=ice-pwd:d5a493a07b92e452116a851e083e1c78\r\na=ice-ufrag:721f69a3\r\na=mid:application2\r\na=setup:active\r\na=sctp-port:5000\r\na=max-message-size:1073741823\r\n"}} ``` which leads to: ``` 0:00:02.007849785 90 0x7fc2a0002030 WARN webrtcsink net/webrtc/src/webrtcsink/imp.rs:3238:gstrswebrtc::webrtcsink::imp::BaseWebRTCSink::handle_sdp_answer: consumer from session 56a17f8d-2585-4d4b-9f2e-3009450a19e9 refused media 0: Some("m=video 0 UDP/TLS/RTP/SAVPF 120\r\nc=IN IP4 0.0.0.0\r\na=inactive\r\na=mid:video0\r\na=rtpmap:120 VP8/90000\r\n") ``` and a connection close.

Why Firefox could respond with VP8 to the H264 request?

Recently, I switched to Fedora 39. At first, Firefox was working fine, but after I logged into my Firefox account, the fonts of some languages stopped rendering, and this started happening with almost every site that was using system fonts.

Since the latest update, when I right-click on a bookmark or an item in the history list (from the menu or the bookmarks toolbar), I still get the menu that has items like "Open in new tab" or "Edit Bookmark".

However, the focus for the mouse stays on the previous menu, so that I can't click on anything in the "right-click menu", instead it is interpreted as a click in some random item in the previous menu.

Going into troubleshoot mode didn't help, so I don't think it's my configuration causing this.

Hey,

I have previously exported my bookmarks in an HTML file. When reinstalling Firefox, I tried to import them using the HTML backup file. It says that 309 bookmarks have been found, but nothing changes on the bookmarks bar, still showing the "Import bookmarks" bookmark. These are very important bookmarks I would really like to get back, can you help me please ?

Hello, I have a problem: After an automatic update of the language packs, parts of the Firefox menu (version 126.0) are displayed in EN. Parts in DE. Seems to be related to the update... how can I change this again? I have already changed the language settings. Didn't help...it appeared after an automatic update on May 28. Thanks for an idea :)