Diễn đàn hỗ trợ Firefox

Firefox has been my browser of choice for well over 20 years. I have a game I play every day (from FaceBook) just this week when I try to go to it on my laptop - it says your browser does not support WebGL. it has always opened using Firefox - this is a new error message. and the computer is only 5 months old and has Windows 11 on it. I do not want to switch to Google or Edge.

Like I said - opening the app worked every day up until about a week ago. What gives?

I have been using Google Chrome for years having set it up to open the same 8 Tabs and several bookmarks. What I liked about it was that no matter what PC I went to once I logged into Chrome I was given the same confiuration across several PCs including Linux which I am gradually moving to. However to date I just cannot get my other PC's whether Linux or Windows to do the same. What I want to know is that can I open Firefox on any other PC, login and and get the same configurantion automatically? .

Hello I got a pop up or it was new tab informing about new firefox functions. It was about profile creation and management. Now i have two profiles and cant switch back to my old one. I cant seem to be able to delete new profile to return to my old one.

I assume Mozilla developers are working on this?

https://singularityhub.com/2026/04/10/anthropics-mythos-ai-uncovered-serious-security-holes-in-every-major-os-and-browser/

Quote from the article

"Its capabilities are a step change from the previous best models. Given the challenge of attacking the Firefox web browser’s JavaScript engine, Anthropic’s previous most powerful model Opus 4.6 succeeded just twice, compared to 181 times for Mythos. Most worryingly, the team found that engineers with no security background could use it to develop successful attacks overnight."

Hello,

The website I log in for internet banking (https://www.sparkasse-rhein-maas.de/de/home.html) is shown as written in brackets when opened in Edge, but as www.sparkasse-rhein-maas.de/de/home.html when I open it in firefor. And Firefox tells me it's not safe when I want to log in. BUT - as I've only just discovered when I copied and pasted it in here - when copied it shows as https://www.sparkasse-rhein-maas.de/de/home.html, so safe after all? How can that be? I hope there's a good explanation.

Thanks in advance Bettina

Moderator note: This question has been edited to correct the formatting.

Installing the latest version of Firefox and Debian 13.

Following the instructions in the Mozilla Support document Install Firefox on Linux https://support.mozilla.org/en-US/kb/install-firefox-linux

Operating as Super User.

Chose the option Install Firefox .deb package for Debian-based distributions (recommended)

Steps 1, 2, and 3 worked exactly as expected with in a terminal and using bash.

Step 4 and 5, following the For Debian Trixie and Newer choice does not work. A lot of digging on the internet and found that the command beginning with cat <<eof needs to be cat <<’eof’. the second part of this process has same issue. appling new information solved problem both statements now work. < p></eof>

At this point you have a directory /etc/apt/keyrings. In this directory you have the file packages.mozilla.org.asc Step 3 returns success. You have also successfully applied steps 4 and 5. In directory /etc/apr/souces.list.d you have the file mozilla.sources.

It contains the instruction “Signed-By: /usr/share/keyrings/packages.mozilla.org.gpg”

No where in the previous stepd was the file Signed-By: packages.mozilla.org.gpg ever created.

Why is the deb package looking in /usr/share/keyrings when step 2 puts a similarly named file Signed-By: /usr/share/keyrings/packages.mozilla.org.asc in /etc/apt/keyrings

Step 6

Running apt update returns

Err:4 https://packages.mozilla.org/apt mozilla InRelease  Sub-process /usr/bin/sqv returned an error code (1), error message is: Error: Failed to parse keyr ing "/usr/share/keyrings/packages.mozilla.org.gpg"  Caused by:     0: Reading "/usr/share/keyrings/p ackages.mozilla.org.gpg": No such file or directory (os error 2)     1: No such file or directory (o s error 2) Warning: OpenPGP signature verification failed: https://packages.mozilla.org/apt mozilla InRelease: Sub-process /usr/bin/sqv returned an error code (1), error message is: Error: Failed to parse keyrin g "/usr/share/keyrings/packages.mozilla.org.gpg"  Caused by:     0: Reading "/usr/share/keyrings/pac kages.mozilla.org.gpg": No such file or directory (os error 2)     1: No such file or directory (os error 2) Error: The repository 'https://packages.mozilla.org/apt mozilla InRelease' is not signed.

Help

This is a follow up of previous posts. Note to Wxie & Denys

Okay. So I downloaded Firefox on my chromebook from flathub, but it keeps crashing. I open a new tab: it crashes. I close a tab: it crashes. I don't open or close anything: it crashes. I don't touch anything: it crashes.

I've says that either my theme or one of my add-ons is causing the crashes but I removed my theme and it still crashes and I can't remove any add-on because it crashes if I try to open a new tab.

Now, did/does anyone else have this problem or am I just stupid and missing a very obvious thing.

Yesterday, I had a trusted Firefox browser with bookmarks going back many years. Today, I have a Firefox browser which has zero bookmarks and no import capabilities. For the first time since Firefox, Edge is starting to look better.

Hallo, zum wiederholten Male hat sich meine Firefox Startseite verändert und meine angelegten Tabs in der Linken Spalte sind verschwunden. Ich habe die Tabs sorgfältig angelegt und wenn Sie mir diese Einstellungen nicht wieder anlegen können, dass wechsle ich meinen Browser, weil das sehr nervig ist und unangenehm! Freundliche Grüsse, Wilfried Schlachter

There is a document produced by Mozilla Support entitled Install Firefox on Linux. There are tow commands explicitly for Trixie. They both start with cat <<eof. the first one didn't work and was obviously incorrect. after much digging i found that wrapping piece eof like this 'eof' works. did not figure out, someone else did. hope mozilla support will update file. < p></eof.>

This is a reply to WXIE about a problem I wrote about yesterday. The document i am refering to can be found here. https://support.mozilla.org/en-US/kb/install-firefox-linux

I am referencing Step 4 for Debian Trixie and Newer.

I got over/thru those issues and when I ran apt update I found that the package was looking for Firefox was looking in a different place than where the previous steps place stuff. I am just comping back to Unix/Sun OS/Linux and 30 years working with a different OS. I hope this document will be updated after someone actually takes the steps. I will continue learning.

I am not a computer nerd I can only describe what is happening. I am addicted to puzzles and do them every day but am encountering problems nearly every day this week of the puzzle pieces not responding to mouse and have to shut down the computer. At other times I am kicked out of the site and returned to my desk top. No amount of trying to then get back into firefox is useless until much later on. Why is this happening?

An Add-on (a theme) I've been using, Graphite Grace by compilan, has been removed with the following message:

"This add-on is blocked for violating Mozzila's policies and has been disabled".

As a user, I feel I have the right to know what policies were violated, and whether the add-on was indeed malicious as well as what data may have been compromised. Where can I get that information?

I was browsing for vacant jobs in LinkedIn and ended up on this page: https://www.linkedin.com/jobs/view/4400116024/?trackingId=&refId=&midToken=AQHkKqfITpiwdw&midSig=2f8JsuceFtMYc1&trk=eml-email_jobs_application_rejected_01-similar_jobs-0-similar_job&trkEmail=eml-email_jobs_application_rejected_01-similar_jobs-0-similar_job-null-g3nlj~mo2hn6z8~of-null-null&eid=g3nlj-mo2hn6z8-of&otpToken=MTAwMjFlZTQxNjJhYzljM2JlMmYwMmVkNDAxYWU3YjA4NmNiZDQ0MzlkYWQ4NTZjNzljMTAxNjg0ZjU4NWZmM2YzZGZiN2JjNTVjNWZjZTc3YjhmZDg3ZWQ5YTExZWUyMDg1N2Q1YzI4OGNjNDU0MjU3YTEsMSwx But pressing the Apply button, did not take me to the application page, but instead a page that was saying: "Be careful. Something doesn’t look right. Firefox spotted a potentially serious security issue with jobs.tuvsud.com. Someone pretending to be the site could try to steal things like credit card info, passwords, or emails." And there was no option to ignore this and just go to the site??? I needed to open MS Edge instead, to be able to apply for the job???