Hiển thị các câu hỏi được đánh dấu: Xem tất cả các câu hỏi
  • Đã giải quyết
  • Đã lưu trữ

MP4 videos encoded with H264 say "Video can't be played because the file is corrupt"

I routinely record short screencasts with Kazam, and I can't watch my own videos after posting them on sites like GitHub because Firefox says "Video can't be played becau… (xem thêm)

I routinely record short screencasts with Kazam, and I can't watch my own videos after posting them on sites like GitHub because Firefox says "Video can't be played because the file is corrupt". Or for example when I upload them to sites like ezgif to convert them to a GIF, which works just fine because, well, the file is not corrupt. Other browsers like Chromium play them just fine.

Apparently the "OpenH264 Video Codec provided by Cisco Systems, Inc" is properly enabled in my system. This has been happening to me for months or years, but only today I decided to open a thread here.

There are two things here:

1. Firefox can't play the file. I'm sure there's some sort of misconfiguration on my side, or bad defaults, or a missing plugin, or similar. 2. Firefox shows a misleading message. The file is not corrupt! The root cause is something else.

Any advice on how to fix the first one?

Được hỏi bởi astrojuanlu 1 năm trước

Được trả lời bởi Denis 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Crash due to XML parsing error

I'm using 64-bit Linux Mint 20.3 LTS, and the latest version of Firefox from the repositories (101). Suddenly, for no reason I know, my default profile has started crashi… (xem thêm)

I'm using 64-bit Linux Mint 20.3 LTS, and the latest version of Firefox from the repositories (101). Suddenly, for no reason I know, my default profile has started crashing immediately on trying to run Firefox. A small window comes up with the error message

XML Parsing Error: not well-formed Location: chrome://browser/content/browser.xhtml

     <button when-cofnection}"secure-cert-user-overridden"="" <="" pre="">

and then a line of ------^ where the ^ indicates between the t and the i of cofnection

Yes, I emphasise that I HAVE copied the error message carefully, including the mismatched bracket pair and the cofnection rather than (I assume) connection

I've managed to get a working version of Firefox by creating a new profile and using that (as in for posting this request for help), and I do have a recent backup of my bookmarks, but it will be a royal PITA if all my logins and passwords have disappeared. I don't want to go any further than this without some guidance, as all the messages I've found detailing how to fix this seem to make the assumption that I'm running Windows.

Can anybody help, please?

</button>

Được hỏi bởi brian_m 1 năm trước

Được trả lời bởi cor-el 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

How to get rid of the Firefox banner redirect in v101?

Generic Firefox 101 in Linux Mint Cinnamon 20.3 is installed in the /opt folder and on opening Firefox a activates a redirect page is activated. [url]https://www.mozilla… (xem thêm)

Generic Firefox 101 in Linux Mint Cinnamon 20.3 is installed in the /opt folder and on opening Firefox a activates a redirect page is activated.

[url]https://www.mozilla.org/en-US/firefox/new/?redirect_source=firefox-com./url

How can I get rid of it?

Được hỏi bởi ineuw 1 năm trước

Được trả lời bởi cor-el 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Code: 4 | Message: Something went wrong during native playback

Hi all. Did a search but found nothing that helped. Just updated my Fedora 36 workstation and tried to play videos in CNN and MSNBC web sites and get the error message: "… (xem thêm)

Hi all. Did a search but found nothing that helped. Just updated my Fedora 36 workstation and tried to play videos in CNN and MSNBC web sites and get the error message: "Code: 4 | Message: Something went wrong during native playback." I am using the latest Firefox WEB browser. UTube videos are playing fine. Someone has stated on the Fedora forum that they have the same problem but has no problem in Chrome on the same machine. Any ideas? Thanks in advance. Bob BTW, this happened in two machines running Fedora 36 and Firefox 101.0.

Được hỏi bởi 1bbrazie 1 năm trước

Được trả lời bởi jonzn4SUSE 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

I can't find my bookmarks from windows into ubuntu.

I was using Firefox on windows 10 laptop, everything was synced with my account. Now after switching to Ubuntu I can't see my bookmarks, Just an empty toolbar. Now I don'… (xem thêm)

I was using Firefox on windows 10 laptop, everything was synced with my account. Now after switching to Ubuntu I can't see my bookmarks, Just an empty toolbar. Now I don't have access to my old laptop, I sold it.

Any help?

Được hỏi bởi GauravSaini 1 năm trước

Được trả lời bởi jonzn4SUSE 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

WidevineCdm plugin has crashed

Whenever I attempt to access DRM content such as netflix or spotify I am notified that the WidevineCdm plugin has crashed. I'm running firefox version 101.0.1 on Kubuntu … (xem thêm)

Whenever I attempt to access DRM content such as netflix or spotify I am notified that the WidevineCdm plugin has crashed. I'm running firefox version 101.0.1 on Kubuntu 22.04, I am running the debian package release, but I had this issue with the snap version too. I've submitted crash reports, but they're all "EMPTY: no crashing thread" (https://crash-stats.mozilla.org/report/index/20af09a5-6bc4-4719-9242-38f5c0220614 here's one).

Được hỏi bởi mason.gulu 1 năm trước

Được trả lời bởi mason.gulu 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Firefox 101.0 is telling me I need a video codec but it does not say which one. How do I find out?

Firefox says I need a video codec to play a video (that is aparently somewhere on the page). It does NOT tell me what video, what video format, or what codec I need. H… (xem thêm)

Firefox says I need a video codec to play a video (that is aparently somewhere on the page). It does NOT tell me what video, what video format, or what codec I need. How do I find out what codec I need?

Firefox version: 101.0 (64 bit) OS: Fedora 36

Được hỏi bởi dkramber 1 năm trước

Được trả lời bởi cor-el 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

I can't set a default behaviour for download of *.XLSX files

I am trying to download a spreadsheet file which has a .xlsx extension. Firefox insists on downloading the file (my default action) but I want to be given the option to o… (xem thêm)

I am trying to download a spreadsheet file which has a .xlsx extension. Firefox insists on downloading the file (my default action) but I want to be given the option to open in my spreadsheet program (Libreoffice).

Looking in Settings and scrolling down to Files and Applications -> Applications, there are other spreadsheet formats present but not one for .xlsx. How do I add the "Always Ask" option for .xlsx files?

Libreoffice is the default system application for opening these files.

Được hỏi bởi tc68 1 năm trước

Được trả lời bởi Terry 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Blank pdfs

For some reason, whenever I load a pdf from within Firefox, I get a new tab with the regular toolbar displayed on top of pdf files, but the document itself is completely … (xem thêm)

For some reason, whenever I load a pdf from within Firefox, I get a new tab with the regular toolbar displayed on top of pdf files, but the document itself is completely blank (see attached screenshot). This issue just started today and I assume it was a result of an update, since I don't recall making any changes to my settings (I'm using Firefox 101.0.1 on Ubuntu 20.04).

I've tried opening multiple files from a variety of sites with the same result. All of them open fine using my system's pdf viewer, as well as from within Chromium. I've tried disabling my plugins, putting Firefox into safe mode and resetting all the handlers, to no avail. Any help would be much appreciated.

Được hỏi bởi jesse20 1 năm trước

Được trả lời bởi jesse20 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

As webdeveloper : how can i ask canvas usage before using it ?

Firefox allow to disable access to canvas for lowering fingerprinting, it's cool ! But as web developer : i like to ask this access before try to using it, So… (xem thêm)

Firefox allow to disable access to canvas for lowering fingerprinting, it's cool !

But as web developer : i like to ask this access before try to using it,

Something like :

1. Do you alllow canvas ? 2. Show the browser part 3. Wait for user answer 4. It's OK : download PDF done with canvass 5. It's not OK : shown an error to user.

To avoid such situation (see screencast)

Được hỏi bởi Shnoulle 1 năm trước

Được trả lời bởi Shnoulle 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

[LINUX][NON-WINDOWS][ONLY REPRODUCABLE ON LINUX] Sessionstore variables for OS restart don't do anything

browser.sessionstore.resuming_after_OS_restart = false. My browser still restores on os restart. Startup -> Restore previous windows and tabs is unchecked browser.sess… (xem thêm)

browser.sessionstore.resuming_after_OS_restart = false. My browser still restores on os restart. Startup -> Restore previous windows and tabs is unchecked browser.sessionstore.max_resumed_crashes = 0 browser.sessionstore.restore_on_demand = false browser.sessionstore.resume_from_crash = false

I do not and will not manually close my browser session every time I want to shut down my computer in order to get it to do what it's supposed to. Linux sends SIGTERM to all running processes on shutdown. Firefox isn't handling this correctly, obviously, because if it was, then my settings would be getting respected. SIGTERM is the standard signal sent to windows that need to close gracefully and are expected to still be functional.

NOTE: Do not provide windows-specific support to this thread. I am not running firefox on windows, and I do not possess a windows computer or license.

Được hỏi bởi ctrentsj 1 năm trước

Được trả lời bởi jscher2000 - Support Volunteer 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Load temporary add-on button not displaying popup

I'm trying to load a temporary add-on on my browser, but when I click the button "Load temporary add-on", nothing show up. I tried to look for errors in the console or d… (xem thêm)

I'm trying to load a temporary add-on on my browser, but when I click the button "Load temporary add-on", nothing show up.

I tried to look for errors in the console or debugging tool, but nothing. With snap, I removed with the purge option my Firefox and install it again, but the issue still appears.

Some technical details: Ubuntu 22.04 LTS Firefox version 101.0.1 (64-bit) Mozilla Firefox Snap for Ubuntu canonical-002 - 1.0

Được hỏi bởi rothan.benjamin 1 năm trước

Được trả lời bởi rothan.benjamin 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Is there a way to get a list of all tabs open in all windows?

A long time ago, I saw a list of open tabs in all windows, not just in one window, as it is now. (By the way, Google has added such a feature to Chrome. Clicking on the a… (xem thêm)

A long time ago, I saw a list of open tabs in all windows, not just in one window, as it is now. (By the way, Google has added such a feature to Chrome. Clicking on the arrow allows us to see any open tab and navigate to it.) I am currently using Tab Manager to search for a tab. But the tab manager is not the best option because it is too slow to open and requires too many resources. Can I restore the old behavior to see tabs in all windows?

Được hỏi bởi YDUBINSKY 1 năm trước

Được trả lời bởi cor-el 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Firefox has become very slow lately.

Firefox has become very slow for some two weeks om my desktop with Linux Xubuntu 18.04. Some sites can be approached without problems except for the speed, other sites ar… (xem thêm)

Firefox has become very slow for some two weeks om my desktop with Linux Xubuntu 18.04. Some sites can be approached without problems except for the speed, other sites are opened after some time, but freeze so that scrolling and clicking on links won't work. I tried to find an answer in the Settings......

Được hỏi bởi edschijf 1 năm trước

Được trả lời bởi edschijf 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Gap to the left of tabs when menu bar is hidden/unchecked

Hello, I am running Firefox v101.0.1 (64-bit) on Linux (Pop!_OS, installed as a flatpak). I am using the default system theme in dark mode, though switching to the Firef… (xem thêm)

Hello,

I am running Firefox v101.0.1 (64-bit) on Linux (Pop!_OS, installed as a flatpak). I am using the default system theme in dark mode, though switching to the Firefox dark theme or other themes does not change anything. When I allow the Menu Bar (File, Edit, View, etc.) to be present, the browser tabs on the next line are aligned correctly, going all of the way to the left. When I uncheck the Menu Bar, however, a gap appears to the left of the tabs. I have not seen this behavior on Firefox in other environments (Debian, RHEL, Windows), and I'm wondering if there's a way I can remove that gap. I have attached screenshots showing how the tabs are aligned with and without the Menu Bar.

Thanks so much!

Được hỏi bởi avram.meir 1 năm trước

Được trả lời bởi cor-el 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Sign in password problem.

Hi, I hope someone can help me. I am an author and sell my book through KDP Amazon. Firefox is my default browser but will not let me log in to KDP. No problem with othe… (xem thêm)

Hi, I hope someone can help me. I am an author and sell my book through KDP Amazon. Firefox is my default browser but will not let me log in to KDP. No problem with other websites including Amazon.com When I open the KDP log in page it accepts my email address but the password button has a row of asterix right across the window. I cannot delete whatever is in there or change the password via the forgotten password route. Thus to sign in to KDP I have to use an alternate browser. With both Opera and Chrome I can sign in with no problems. I have added a screenshot of the KDP log in which illustrates the problem. Grateful for any solution to this irritation. Thanks, Paul

Được hỏi bởi paullie1 1 năm trước

Được trả lời bởi jonzn4SUSE 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Can't get rid of google.com as startup page

Hi, Just installed Ubuntu on a new laptop, with Firefox. No add ons. Have changed my homepage to www.duckduckgo. Have changed my default search engine to duckduckgo. In … (xem thêm)

Hi, Just installed Ubuntu on a new laptop, with Firefox. No add ons.

Have changed my homepage to www.duckduckgo. Have changed my default search engine to duckduckgo. In about:config my browser.startup.homepage says www.duckduckgo.

Have also changed browser.startup.homepage_override.buildID to www.duckduckgo.com and browser.startup.homepage_override.mstone to www.duckduckgo.com

But STILL, every time I start Firefox, I'm taken to google.com. Please cn someone tell me how to stop google coming up when I start Firefox.

Thanks, Ivan

Được hỏi bởi ivanwonbtanner 1 năm trước

Được trả lời bởi jscher2000 - Support Volunteer 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Missing Bookmarks

An automatic update of Firefox which resulted in a "quit/create new profile" choice has removed all my bookmarks Of the four profiles stored in "about:profile" three are… (xem thêm)

An automatic update of Firefox which resulted in a "quit/create new profile" choice has removed all my bookmarks

Of the four profiles stored in "about:profile" three are identical (ie. have only the default bookmarks stored) and one, generates a "quit/create new profile" message.

The "bookmarksbackup" folder (in /home/user/.Mozilla/Firefox/zs1jki8t.default) is empty.

The "import/backup" option (in Manage Bookmarks) offers nothing to choose. There is no 'list of dated automatic backups.'

Firefox did not create an "Old Firefox Data" folder on the desktop.

Browser privacy "strict". "Never remember history" was selected.

Running Firefox in Manjaro (Linux)

Help.

Được hỏi bởi Wayn58 1 năm trước

Được trả lời bởi Terry 1 năm trước

  • Đã giải quyết
  • Đã lưu trữ

Can't sync firefox custom preferences

I know there's [[an article|https://support.mozilla.org/en-US/kb/sync-custom-preferences#w_sync-custom-preferences]] on how to sync custom preferences. I wanted to sync m… (xem thêm)

I know there's [[an article|https://support.mozilla.org/en-US/kb/sync-custom-preferences#w_sync-custom-preferences]] on how to sync custom preferences. I wanted to sync my toolbar customizations and some other preferences like disabling disk caching. And I don't even have other firefox instances, instead I just want to sync only on one device, so that I can continue the same setup when I signin later on the same device.

I've tried to add services.sync.prefs.sync.browser.uiCustomization.state, "services.sync.prefs.sync.browser.cache.disk.enable" and set it to true. But it doesn't work. What am I missing? No one seems to address this. May I am missing something.

Được hỏi bởi Prince Cooper 1 năm trước

Được trả lời bởi Prince Cooper 1 năm trước