Firefox Community Forum

Hello guys, as in title - I use custom NextDNS set of rules on DNS-over-HTTPS. As of today, Firefox can't connect to the provider. AFAIK Troubleshoot Mode is also affected. The other devices using NextDNS on my network work just fine and when I set the DNS to work system-wide as a kind of workaround, I don't get an issue. Same when I use other DNS-over-HTTPS options in the Firefox Preferences. Yesterday the problem didn't occur and I haven't performed any updates since yesterday - both Firefox and NetworkManager seem to be up to date.

Additional info: OS: EndeavourOS (Arch Linux) Firefox version: 129.0.2

If any other info is needed, I'll be happy to provide it to you.

I seem to have a problem with Firefox's builtin PDF viewer. Instead of black text on a white or gray background or something else sensible, I get black text floating over my desktop background in the part of the Firefox window that's showing a PDF. PDFs display fine in an external viewer, but that's just passing the buck, isn't it? Is there a way to fix this on Firefox?

I suspect hardware acceleration is the issue, but everything else seems fine, so I don't want to just blanket disable hardware acceleration. How can acceleration for PDFs alone be disabled?

Hello guys,

The trouble I ll present you might come a bit late, I've just never thought about asking on this forum (didn't even know that it exists lol) and I spent a lot time on tutorials trying to find the solution... lol 😩

My situation : I have a laptop with debian 12 stable. Early July, I updated my apps, Firefox 128 has just been released. Since the Firefox 128 update, I can no longer execute Firefox, I always get the pop up message :

Failed to execute child process (no such file or directory)

I've tried many times to uninstall & reinstall, purge & reinstall. Still the same "failed to execute... " message. all the subsequent updates (128.X and 129.X) haven't solved this problem...

On the other hand, Firefox ESR 128 works like a charm.

Is anyone in the same situation as me ? 😕

Wishing you a nice day :)

Hi!

I've been browsing the web looking for a way to access the browser's current profile name programmatically. I'm writing a little browser extension that should run code conditionally depending on what the current profile is. I'm wondering if there's any way to do this? The closest thing I found was runtime.getBrowserInfo() runtime.getBrowserInfo().

I've installed firefox with pacman on Linux, and I installed arkenfox. It did not work, I tried other user.js', none worked. I've also tried wiping my entire firefox root folder, then using arkenfox, but did not work.

Firefox is adding empty lines to the css file in web developer like so:

1. videoFiles {

 left: 0;
 z-index: 3;
 width: 250px;
 height: 40px;
 opacity: 0;
 cursor: pointer;

}

1. image_files {

 height: 40px;
 width: 250px;
 z-index: 3;
 opacity: 0;
 cursor: pointer;

}

.previewVid {

 width: 50%;
 padding: 10px;

}

Those empty lines are not in the css file and so it is reporting the wrong line numbers. So hard to find the correct line in the actual file.

Up until a few weeks ago, I could see and access Mobile Bookmarks (I sync these to my Firefox Desktop) using the Firefox Desktop browser from the Bookmarks drop-down menu in the topmost toolbar.

Now, I can no longer find Mobile Bookmarks in the Bookmarks drop-down menu.

I can still find it by choosing Manage Bookmarks and, in the resulting pop-up, I can see it in its regular location there. However, this is significantly less convenient as it requires me to juggle another window and perform more clicks.

Is it missing due to a bug? Does Mozilla intend to fix/address this?

Thank you in advance for any help.

When I copy something to my clipboard I can paste it into Firefox. Into web pages and also into the URL bar.

But when I copy something in Firefox, it does not go to the clipboard. The clipboard still hast the content which was already there.

Also strange: When I cut text in a textarea, input element or the URL bar, the text is removed. But it is not sent to the clipboard. When I cut and paste, the text I get is what was previously in the clipboard.

What could be the cause? How can I debug this problem?

As I said in the title, the spellchecker add-on I use, LanguageTool, does not work on this site. I am not fine with that. What's the best way to get it working here? Any answers that amount to "you don't" are not acceptable.

Hi. I got a new laptop some weeks ago (Linux Fedora) and I've been using Firefox without any problems until last week. When watching Youtube videos my system shell crashes completely. This problem ONLY happens with Youtube videos and Firefox. Other browsers work fine and I don't have this problem in other websites.

Recent crashes ID: bp-f6b555b9-0fbb-447d-a3b3-9f7ee0240818 bp-1fad31a3-0735-49dd-92ac-44e2d0240818 bp-19ae85a5-8bd3-4d3b-b366-f65a10240818 bp-7ca6ded3-871e-45ad-8351-f21c40240818 bp-88f4aca2-437b-45d1-8d7a-11a7c0240818 bp-ebb8ed44-af42-44c1-89f9-54b1f0240818 bp-3aa6e40e-467c-4c72-8373-b23e30240818

I am trying to submit a new Add-on, Firefox requires to add 2 factor authentication, and when I am trying to do that and enter code it tells me that is wrong even I am sure it is right. I tried many times with many auth app on my phone Hope to solve that to submit my Add-on

I need to search for more than one search term in about:config. How can I do this?

Is there some kind of syntax I can use like the pipe symbol to do something like oneword|anotherword or do I have to know literally the exact thing I'm looking for before looking?

thanks in advance

I am running Ubuntu 22.04 Jammy on my desktop. Problem does not appear in Windows 10.

I can click the search box and the list of search engines shows. I can change the default search engine in settings. Mouse over highlights the selections.

Clicking on one of the choices does nothing.

I think there have been 2 updates since the problem first appeared.

PS: There also appears to be an issue with js. Some functions on websites do not work although most of the scripts do work. In particular comments on comicskingdom.com do not work and the same with comments on seattletimes.com which apparently uses the same script. Both websites work on Windows 10.

Hello, everytime I want to open a website that I frequently use, Firefox fails to suggest it as first and rather suggests the "base" url. Example: I want to open https://www.arabdict.com/en/deutsch-arabisch but typing "ara" in the URL input field always suggests https://www.arabdict.com although the first link is both bookmarked and pinned on home. Can someone tell me how to fix this if it's even fixable yet? Chrome does this if you want to compare the user experience I'm missing since switching to Firefox. Thank you!

P.S: sorry for the first screenshot, I couldn't catch the suggestions menu with the built in screenshot tool.

pCloud PDF links do not open in Firefox for Linux.

When I share a pCloud PDF link to social media groups, the link doesn't work. I know that the link will open in other browsers.

We ask this today, August 20, 2024, in the hope of finding a current solution to a question that has been asked for years:

How to prevent Firefox from updating?

When we search for this answer online, we find many answers -- all of which seem outdated. The many solutions from many years ago (which appear at the top of search listings) no longer work or are no longer available.

We like Firefox. otherwise we would not even bother asking. But we do not like that it appears users are losing the ability to customise their Firefox experience. We do not like that updates will sometimes break the way that we use Firefox. And we especially do not like that Firefox has become increasingly difficult to constrain.

If we wanted software that does not respect us we have many other other options.

What we want is: the option to tell Firefox that we will continue using this specific version of Firefox for as long as we wish, even if that leads to many terrible things. Yes, we want to know what those terrible things might be and to understand the implications of skipping this new update, but we want to make that informed decision; we do not want updates shoved down our throats.

For those running Ubuntu (Jammy) in August of 2024 how does one successfully prevent Firefox (recent) from updating? We would prefer a menu option but will accept a third-party solution if necessary. We want, among other things, to put a stop to the ominous "in X days we will install the update regardless of your obvious intentions to avoid an update" messages.

(We had these same issues back when we used Windows. The ability to prevent Firefox from updating seems to have been lost many years ago.)

Helpful responses are welcomed and appreciated.