Diễn đàn hỗ trợ Firefox

I've just installed Firefox Developer. I cannot get Mozilla VPN added to it. Can you help? Do I have to remove Mozilla VPN from the old Firefox installation before it will work?

Also, can I run both Firefox and Firefox Developer at the same time? I'm concerned that Profile entries an other variables might be corrupted.

Last, are there any articles or videos available to help users learn how to use FxDeveloper?

TIA

I've recently been having troubles playing videos on Firefox.

My school website uses Vimeo embeds, but recently when I've put the videos in fullscreen, after 4-5 seconds it stops responding. The video freezes but the audio continues, and the controls don't come up when I move the mouse. I can press ESC to exit fullscreen, but the controls are still gone and the audio keeps playing. Then after a few more seconds I get the warning "This page is slowing down Firefox, to speed up your browser stop this page".

If I don't use fullscreen but instead zoom in on the page, it also freezes. If I try the same things with Edge it does not freeze. I also made sure that it was only affecting Vimeo videos, by testing with other platforms and other vimeo links.

I found previous reports of this issue, but all of them were either on Linux, or it was an issue with flash player, which is not relevant anymore.

Not quite sure how to debug this but I would be happy to provide further info. It's really important that it works again :/ Thanks in advance!

My repro steps: 1. Find a video on https://vimeo.com/watch 2. Play it and enter fullscreen 3. Wait around 6 seconds

No crash report, no trace, no anything. I click "Save [insert] as...", and Firefox hangs and stops responding. Windows automatically shuts it off when clicking. Launching Firefox again sometimes says there was a problem reloading the session, but that's not guaranteed.

Try this test first. Go to About:Config, write TLS , change the setting to max (4) . Then attempt to download the firefox installer. The website won't load, as the webmasters did not enable TLS 1.3 , which in 2023 is kind of a shame. The browser cannot update itself either automatically if only TLS 1.3 is allowed, and TLS1.2 is disabled.

The can be an easy fix. I wonder why Mozilla did not solve this already years back. I also wonder why fans, and security researchers did not scream about it in the past..

For the download.mozilla.org the cipher suite Key Exchange is P256, while the Signature is RSA-PKCS1-SHA512, for Transport Layer Security 1.2

I'm sure Mozilla can do better then this, so kindly review these items, and update your website with stronger / modern encryption standards. Decommission the legacy ones please. While you are at it, please also enable HSTS. ;) Cheers!

A month ago I started to have problem with twitch. After 5minutes or 2 hours- random times or random tabs, if I have opened more than 1, which is always the case. Some tabs or all, again it's random will give twitch 2000 error and refresh, closing tab,etc nothing will work, except closing WHOLE browser, not just tabs and this is not guaranteed that it will work.

I'm losing my mind with closing whole browser-windows-tabs on different monitors and then re-opening all of that again when I get 2000 error and I always do get it.

Did like 50 re-installs, it's always the same. I tried to go back to older version, but Firefox always want to create new profile saying I have old version installed and I DO NOT want that, I want everything as it is right customized,etc right now.

Only in Firefox freeze the live streams in YouTube , Twitch , etc if I set 1080p60 , however if a select 720p60 then the live stream play smoothly .

please someone can help me ?

I already try to change somethings in about:config , but nothing change. same issue .

Hello, I've noticed a change since the last update and don't understand why?

When opening the bookmarks tab I would get the drop down of a long list of links I have saved. I sometimes bunch them into groups so when looking down the long list, I can see the link I want better when more than one are from the same website.

But my issue is that when I went through the list and found that group of links, I could click onto one to open the page. In the past before the update I could click on the bookmarks drop down again, and still see the same area of links I had just clicked on.

Now when the bookmarks drop down closes it defaults to the top of the list and I need to scan down to find the links I was looking at again. Why? Yes when I closed the browser off and reopened it the bookmarks list would start at the top again. But if left opened I could click on the bookmarks tab and it would open to the same link area I clicked onto last.

Is there a way in settings I can reverse this annoying, unnecessary change.

A word to the Firefox workers that like changing things for no reason. I use Firefox because I like the things your browser has that the others don't. Keep taking the little things away that people like, which you seem to keep doing, then my favourite browser will just become "The same old s#*@" like all the others.

My chat sends garbage. Here I type 'test' to my son. Here is what my chat shows after I press RTN:

2255821536##7637873208AQL/23VRnm9YyO/TaA1HjcHgyffG3PWzb1qU7wbh6N/XZXp1wqd5roGoLrrc92GowtY2Rwkb2255821536##7637873208

I have recently updated my site to run off a different hosting provider, and CloudFlare, a long needed change to my site. However, in doing so, my site has become unreachable on my laptop, with firefox (and other browsers) still thinking that my domain is attached to the old nameservers, causing it to redirect to the "site not found" page of my previous hosting provider. I have tried flushing my system's DNS cache, clearing my browser cache, clearing the browser's DNS records, all to no avail, however, I do know my site works, as on my mobile phone with basic Safari, the site works fine.

my system is on Ubuntu 22.04, and running firefox version 107.0

Every time I open a new tab, another extra tab opens automatically with the following address: https://0.0.0.1/

showing this message: An error occurred during a connection to 0.0.0.1.

I already re-installed Firefox but this bug keems popping up.

BTW: I did not do a d*** thing. It just started yesterday and is extremely annoying!

Hi Guys! Huge fan of Firefox since the early 2000s when I first learned about it. Way more secure, efficient, and lighter than any other browser (IE, Chrome, and now Edge). Firefox is my first download on every new device and my go to even on my iPad.

I've been getting this error message lately and I don't know what to make of it. My saved tabs are working normally (email, work, streaming entertainment). This automatically comes out on ever new start / re-start (Firefox is my default) on separate tab but I am not opening any new website. It's been 2-3 days. At first I didn't mind it but its consistently happening and not just a one time thing. I already cleared my cache data. I've also ran a scan and it's come up clean (I have a paid BitDefender subscription). It's also not the local ip of my machine.

So any help would be great as I really don't want to leak any personal data or have any viruses.

Thank you for your time!

I change nothing in my settings and I am now on Dark background everywhere despite having: - forced the system settings (OS) to stay in light background - in about:preferences appearance I've manually selected (forced) the light background - in about:config I've tried to switch the browser.theme.content-theme to "1" (instead of "0")

this is really frustrating, I would like to get a better "reading" of what happens, as an Engineer I am happy to also squint at logs if needed, please consider adding a preference / settings change log file

Lately when I attempt to download any pdf file I get the 'file name'.pdf with 'failed' as the result (when I check the Download icon on the FF status bar). I looked in my download directory and I found these 'failed' .pdf files with 0 KB and also some files (same name).pdf.part. I changed the file extension (deleted .part) to .pdf and the files would open in Acrobat. Nobody likes inconsistent problems, but occasionally a pdf will download normally!! But it fails more than it works. Using FF 102.0 (64-bit)

When I close a tab, sometimes it crashes. I tried with `-safe-mode` and the error persists. Let me know if I can add more information.

Report ID bp-d44804f7-fd73-4088-9d00-14c880220818

hi how can i delete instagram.com and open default www.instagram.com/?hl=en when i type ins int the firefox?

I keep getting signed out of my Google account whenever I close Firefox. I switched the Enhanced Tracking Protection to Standard, and I do not delete my cookies when I close Firefox. I even tried to disable the Purge Trackers option but this didn't help either. I have some dev-tools extensions installed + Adblock and Decentraleyes. It does not solve my problem if a disable them too. Would really appreciate anyone's insight.

For some reason text on some websites such as wikipedia and timeanddate is completely messed up, it looks like gibberish but is actually just displayed wrong. When you copy the text and paste it into something like Word it shows the text correctly, I've noticed that the text is shifted by one letter forward (e is f, f is g, etc.). I've tried the main, beta and nightly releases as well as reinstalling Firefox. Images attached.

So, I recently had to have my PC repaired. Before sending it in (which ended in a factory reset) I exported all my saved login data to a .csv file. Now, I already changed the setting to allow it to import from a file, but when I select that specific file for import, and hit the button.... nothing happens.

No passwords imported, no popup like I've seen in so many other posts about this issue, no nothing.

How do I fix this? I need to get it operational ASAP without manually copying every single log in. from the plaintext file.

I have a laptop with Ubuntu 22.04. Firefox 307 from deb package works perfect. I wanted to give a try to Flatpak variant 306, which works well too, except two finger gestures back and front won't work. Scroll works. Any scheduled fix for that? Would be cool to move to flatpack completely.