Diễn đàn hỗ trợ Firefox

For some time now FF will not open certain sites that it used to, these sites all open and function normally in other browsers such as Opera. The most important being my online bank! I have contacted the sites involved and they cannot understand why. I have cleared Cache, cookies etc. I'm using FF 88.0 on Ubuntu. Can you help?

Firefox 101 Xubuntu 20.04

I want to completely disable the Firefox pop-up notifications regarding updates. I have searched the web for an answer and cannot find anything workable. Can you please tell me how to accomplish this as the constant nagging is extremely annoying.

In about:config I have the following set with no success:

app.update.auto false app.update.download.promptMaxAttempts 0 app.update.elevation.promptMaxAttempts 0 app.update.enabled false app.update.interval 31536000 app.update.promptWaitTime 31536000 app.update.silent true browser.search.update false update false

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).

Hi. Recently, when I open "beisat.com" or "beisat.org" in firefox it shows the website content in a bad shape. I am 100 percent sure that it is not from server because I have tested with my phone and another laptop. Also tried multiple internet connections. I failed to find a way resolving this error.

When opening a new tab externally, e.g. via `firefox --new-tab <url>` or `xdg-open <url>`, Firefox doesn't raise its window.

If this behavior is abnormal, note that I'm using KDE on Wayland (Ubuntu 22.04) with "Focus stealing prevention" off. If it's normal behavior, is there a way to change it?

Hey there,

Since upgrading to Firefox v100 a few weeks ago I've had incessant problems every time I reboot my laptop.

If I leave Firefox running (i.e. I just hit shutdown and let it sort itself out) then next time I boot up, and I try to open Firefox for it to load my prior session, it spawns a new window and just gets stuck forever. If I close Firefox before shutting down, however, it reloads itself just fine.

This has led to several lost sessions and having to restore using sessionstore, either when laptop has died or I've just shut the laptop down without thinking about it.

I run Kubuntu 20.04.

Thanks Chris

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

I can't play a video when logged into a website - see https://support.mozilla.org/en-US/questions/1371380

I'm sure it is not Firefox as I have also tried Chrome and Opera; same problem. How can I debug this and find out why the video cannot be played ?

I see there is 'Remote Debugging' and 'Browser Console' under 'More Tools'. How do I use these or other tools to find out what is causing the problem please ?

I've read through quite a few posts on this error. Disabled the only extension, and followed guidlines on how to disable tracking protection. I still get the error message.

[quote]Firefox Can’t Open This Page

To protect your security, vimeo.com will not allow Firefox to display the page if another site has embedded it. To see this page, you need to open it in a new window.

Learn more…

Report errors like this to help Mozilla identify and block malicious sites/quote

Have tried the 'Open site in new window', it goes to a Vimeo video and then an error message ..

[quote]Sorry, we couldn’t find that page

Make sure you’ve typed the URL correctly, or try searching Vimeo. You could also watch one of the videos below instead./quote

Even though when I hover the mouse over the 'shield' and the display is "Enhanced tracking protection is off for this site", the error still comes up. I go into settings and the 'Managed Exceptions' shows no entries. Shouldn't there be an exception in there for the site I am attempting to view a video from ? There is no method to add a site manually.

Firefox 101.0.1 (64-bit) on Kubuntu (linux)

Hello

I want to open pdfs from firefox (snap 101.0.1) with the default application of the system (Xubuntu 22.04) and not open them in a new tab within forefox.

But it does not work, as if there was a problem with the system handler but only for pdfs and not for other file formats.

More details :

• I changed Preferences/general/Applications for pdfs to use either "always ask" (and then chose "open" " With system handler" when asked) or "default system application". In both cases the pdf is downloaded but not opened. If I right click on the downloaded pdf in the list of downloaded files and then chose "open with system handler", nothing happens.
• Opening the pdf inside Firefox works well and opening pdfs saved on my disk (outside firefox) as well.
• Opening other file format by choosing to open them from firefox with the system handler works well too (tested eg with .torrent, .xls, .tif,...).
• I tried to change the default system application for pdf (Atril) to other softwares without success (Okular, Evince).
• If I try to open a .djvu file with the "system handler" it is opened correctly using Atril which is the also default for pdfs... So Atril works for .djvu files but not for pdfs...
• I tried to replace the handlers.json file from my profile by a handler.json file from a brand new profile, without success (I still have a backup of my old profile file if needed). I did that because opening with the system application worked before and the bug appeared after I changed all applications preferences to "always ask" (and there were a lot of them in my rather old handlers.json file).

I'm lost...

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.

Reinstalled Firefox on Ubuntu 20 and signed back into my Firefox account and I don't have any of my passwords, bookmarks or extensions, I'm extremely upset - there's very important info I lost!

I recently did a fresh install of Firefox, and now picture-in-picture videos are defaulting always to the top-left corner of the screen and to not stay always on top; each time I open a video or refresh the page and re-start picture-in-picture it reverts to these defaults and I have to manually change it each time. Previously the default had been always on top and would show up in the location & at the size of my previous usage. I would like to adjust the default settings to make that happen again, but I can't find where to do that. I'd appreciate information on how to do this. Thank you!

I'm using Firefox Version 98.0.2 on Ubuntu 21.10 with Wayland and Gnome 40.4.0. I choose a larger cursor size from Ubuntu's Settings->Accessibility->Cursor Size. However, in Firefox the cursor always displayed in the smallest size.

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.