Firefox Support Forum

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

For only the past 2 or 3 days when I open Firefox, there is NO taskbar shown at the bottom of the page. It's just disappeared and I haven't changed a thing! I checked the settings in windows and it's set to permanently show the taskbar. Why all of a sudden the change and how do I get it to restore on Firefox. This is NOT happening with other browsers I'm using!! This is beyond frustrating. I don't understand why things change from day to day without my intervention.

Can I please know the command to activate the two finger left swipe to go back in Firefox and the right swipe to go forward, please?

Regards, Labeeb.

I have started using Pocket, as a way to share between my tablet and my laptop. I now have my new tab page on my laptop set to show recommended articles from Pocket.

Is there a way to increase the frequency whereby these recommended links are updated?

please take off the red add, the pop up total add sign that keeps popping up asking to paid for the add block I am 82 and on a fixed budget. I do not want this service. How do I get it off my computer. When I want to print an article from an e mail.I always have to remove it to save an e mail, or when I want to print an article, I read it later, and I see the total ad block on my printed article stuck on the printed page blocking out what I printed. Its very annoying to have to take it off the screen before I print anything. Please help me. George at [removed email from public]

Firefox 100.0 Ubuntu 22.04 Mozilla VPN 2.8.0

As the title says, Multi-Account containers doesn't detect the VPN, which means that it's not setting the VPN for specific containers.

I suspect this is actually a problem with the "Allow extension to exchange messages with programs other than Firefox" permission. Could be a VPN issue, but gut feeling that it's a Firefox issue, TBH

Anyone else seeing this?

I currently have this add-on installed. It allows you to you highlight certain text, then right click and open up a link to Wiktionary in another tab. Up until a few minutes ago, this menu item was at the very top of the list (i.e. above "undo" and all the rest), but now it's been moved down with all the other add-ons. Image for further clarity.

The add-on hasn't been updated in 6 years, so it's certainly not that. I don't recall doing anything to make it change, but before this, it had been at the top of the menu ever since I added it maybe 2 years ago. Is there any potential way to restore this functionality? The fact that it appeared at the very top of the menu might have been a bug, but if that's the case, it was certainly a convenient one.

Anyway, I'll be looking forward to hearing from you fine folks in this community.

After the last update, when I read my local paper online, Firefox will not advance to the next page when I reach the bottom of the page. I have to manually click on the next page arrow. Two other browsers will still advance so I'm thinking it must be a Firefox issue. Please help

Hi there,

"Open previous windows and tabs" is checked but it's not working. I had to go to history and opened it. It's happening for the last several weeks.

Pls, let me know what to do. MD

See above on Subject = inability on my laptop with Firefox provider to watch certain dramas/films on 4 due to DRM. My problem is trying to follow the instructions hitherto given. I just want to be able to access those sites with DRM overlordship getting in the way. I am an old man who is simple-minded, that is, not 18 years and adept at whizzing around laptops.

Some time within the last day, an extension I use to turn direct image link pages white has stopped working. For context, I use the dark theme provided default by Firefox. I need it for almost all other pages. But when it comes to viewing images, almost all are intended to be viewed on a white background so up till now I used the extension "Image Background Color Picker" to force the page to be white. I never had an issue with this until today.

The extension is still functioning, I can see the lines of code its running on the page using inspect element. It has a feature that creates a checkered background instead of a flat color, which does also work if I turn that on. What I realized is that it seems like suddenly Firefox is using a flat .png as a background image for seemingly no reason? If it worked this way before, it did not interfere with extensions until now. When I disable this through the inspect feature the background underneath is white like intended. This is consistent even if I disable all relevant Add-ons. I've attached image examples of this, with no Add-Ons that should be effecting the page running.

How can I get this to go away? Is there a way to go into Firefox's config and disable it through there? I don't want to have to keep installing more and more Add-ons seeing as Firefox can barely handle the ones I do run. I'm unable to use an ad-blocker to block it because they can't detect the .png on their own, presumably because its a Firefox asset instead of a webpage element? I have no clue. I just want to fix this. I can't use the light theme due to eye strain so for now I'm stuck disabling this .png manually every time I open an image.

Why why why why is FF forcing download of pdf files? It is a horrible problem for me.

Especially because I am a university prof and, in the classroom, constantly display (my own!) files from the course management system on the classroom devices. I DO NOT WANT MY FILES SAVED ONTO THE (PUBLIC) CLASSROOM DEVICE. Never mind multiple copies as it will download EACH AND EVERY TIME I open it.

I have been looking everywhere for a solution or a way to disable this feature, there seems to be no such option but I am seeing a lot of posts from people who object to this as much as I do.

After many many years of loyally using FF and a paid subscriber to some Mozilla services, I am afraid I am going to have to give up using FF is this isn't fixed NOW.

How can the size of the icons, buttons, and toolbar bookmark fonts be adjusted to be bigger? They are tiny and I would like to have control over this but it seems like there is no way to do that, only within the pages.

I am using the latest firefox on a mac w/ catalina.

So, for a few months now, the preview panel in Firefox has been popping up with every successful download of a file from online. Its a bit inconvenient because anytime it pops up, it basically tabs me off a page and interrupts my writing or the like. This wasn't an issue last year when after successful downloads, the downloads icon in the toolbar just lights up blue to signify a successful download. The preview panel popping up every time Firefox successfully downloads something (due to reasons, I download files in bulk from multiple sources) is incredibly irritating. The problem goes away when I just remove the download icon/panel from the toolbar entirely. I just wanna know WHY this bizarre phenomenon happens.

I saw where this was a problem with Netflix, Amazon Video and other sites with Fire Fox and that one person even used professional version and still had the same problem.

What I cannot see is where he got the video codex that allow Netflix to work on Fire Fox version 88, let alone this newest version that Mozilla has created.

I recently installed AdBlocker, but then a site I visit daily closes after it loads.

I uninstalled AdBlocker and the site still closes after it loads.

I assume the problem was from AdBlocker, but not really sure why this happens.

I have always set my option for all download file types to "Always Ask" and now Firefox not only asks me where I want to save the downloaded file, but also downloads a copy to the Windows Download folder. Why am I getting double downloads? I only want one copy of a downloaded file, not two copies. Now I have to go to my Windows Download folder and delete the duplicate downloaded files. My question is, if my Firefox download option is set for all file types to "Always Ask", then why are you downloading the file twice??? I have specific folders where I want files to reside. I don't want to have to remember to go to my Windows Download folder and delete the duplicate files. How can this duplicate file download problem be fixed?

Long time user, Leo

When I right click Firefox in my taskbar I have a list of "recent" links show up. I have turned this off in about:config but they still show up. Any suggestions?