Firefox Support Forum

Hi,

Is there any reason firefox would flag an mp4 file legitimately?

• The file extension and file type are absolutely mp4.
• There seem to be no mp4 related zero days.

Does Firefox perhaps just treat all downloads from suspicious domains as malware? Is there a zero day I missed? Is this based on some missing metadata on the file or something?

Thanks for any advice you can give here, I'm scared.

This site, Costco Instacart, worked perfectly with Firefox as recently as April 15, 2023 but today fails (see attached image): https://sameday.costco.com/store/costco/storefront?zipcode=11021

Cloudflare believes it is protecting itself from online attacks when accessed by Firefox. The same site worked perfectly today, on the same computer, using Google Chrome.

Cloudflare is a major CDN and many important commercial sites, like Costco Instacart, have their content delivered by Cloudflare so this is a major issue with Firefox. For the moment there is a work-around, use Chrome instead, but it would be better to have Firefox address issues with Cloudflare.

Hi, I made a theme but have since not used it and swapped to another. Everytime I open the browser, it swaps back to the one I made for some reason. Under themes, it will still say the one that is showing is the chosen theme, but it most certainly is the one I made. I turn on another theme and toggle back to the chosen theme and it then changes correctly. Any idea why that could be?

Firefox seems to have a problem on Linux using USB Security Keys. I have two Yubico Security Keys which I use for 2FA. The problem seems to be that Firefox cannot communicate with the USB port, as it doesn't make any difference whether the USB Security Key is plugged in or not, the error returned is always the same and the Security Key does not light up.

I believe Firefox's WebAuth code must be fine, as it works on Windows, which is why I think it's some kind of permissions problem. Chrome works perfectly with the Security Keys on my computer.

I've used a number of sites (I've listed a couple below) where you can test your Security Key with Firefox on KDE Neon and the error is always "UnknownError: The operation failed for an unknown transient reason":

https://www.token2.com/tools/fido2-test/ https://demo.yubico.com/webauthn-technical/registration

I cannot log into Bugzilla with GitHub as my GitHub login uses a Security Key as the second factor.

Hello everyone, I wrote an add-on for my own personal use. I don't intend to publish it. So naturally, it isn't verified, but I trust it. I am able to install the add-on as a temporary add-on under about:debugging, and it works as intended. The manifest file contains "browser_specific_settings": {

       "gecko": {
           "id": "example@example.com"
       }

} I would now like to install the add-on permanently. So I packaged it as a zip file. The zip file contains the files directly without a parent folder. Under about:config I set xpinstall.signatures.required, xpinstall.whitelist.required and extensions.langpacks.signatures.required to false. Then I went to about:addons clicked on install add-on from file and selected the zip file. I got the error message: "This addon could not be installed because it has not been verified". I am using Firefox for archlinux, version 112.0.

What am I missing? How can I install this addon?

I apprechiate your answers.

Hi - new to the forums.

I have a fairly retrograde, request :slight_smile:

I want to have Firefox operate with ONLY ONE tab on screen at any time!

By That I mean, whenever I try a new search ,or open a new link, I want it to REPLACE the one and only existing tab always. Firefox will only ever have one tab on the screen- no multiple tabs allowed.

Is this possible?

Many Thanks

Pootler

I'm trying to move to Firefox from Microsoft Edge on Linux. When I go to import data from another browser Edge is not an option. I have a CSV file that I exported from Edge. How can I import this CSV file? I found something on reddit that said to change security.allow_eval_in_parent_process to true, but that no longer works. How can I get my passwords imported without having to install another browser and import to that and then import to firefox?

Good evening, I've some problem with firefox sometime it don't start (if I restart Ububtu 22 kernel 6.0.0 in use firefox start) and some times when I try to save an image it crash an close. Here below you can find the crash code error. Thanks a lot for the support

bp-a115d364-564d-44bc-8fae-3f73d0230418 4/18/23, 20:05 bp-95de88f9-6278-488f-a215-f3f950230418 4/18/23, 20:05 bp-4109917c-889d-4438-87ee-c07860230418 4/18/23, 20:05 bp-6005994f-0c7a-4034-a99e-36c6f0230418 4/18/23, 20:05 bp-47c85daa-3424-4180-aa8f-ce92a0230418 4/18/23, 20:05 bp-47cffc61-f4d2-4992-b89b-5040a0230418 4/18/23, 20:05 bp-22722457-a79b-48ec-868a-fb6100230418 4/18/23, 20:05 bp-74f79011-44da-4952-b6a6-171aa0230418 4/18/23, 20:05 bp-7c96feb2-f162-4bcb-8723-7e88f0230418 4/18/23, 20:05 bp-7dc653c2-564c-4b36-a42b-c19730230418 4/18/23, 20:05 bp-13983b22-11e4-405f-9b1c-b88820230418 4/18/23, 20:05 bp-86c4746b-54c4-4cd2-8fce-846f70230418 4/18/23, 20:05 bp-4c9f03dd-507a-4771-ac99-f2b360230418 4/18/23, 20:04 bp-1b7568a9-876d-45c5-97be-4ada30230418 4/18/23, 20:04 bp-3c751aa9-b660-40cb-bacf-facfe0230418 4/18/23, 20:04 bp-ee90d076-861f-4a1a-b3c1-8c6ab0230418 4/18/23, 20:04 bp-03d70e14-d68e-4eae-b887-2cbff0230418 4/18/23, 20:04 bp-792c1414-1978-4bca-8729-301f20230418 4/18/23, 20:04 bp-a3d53dc5-cbf0-4359-a494-9f9680230418 4/18/23, 20:04 bp-f820bb45-6398-4b79-afe6-a72bf0230418 4/18/23, 20:04 bp-34492a94-e8c4-4756-9c98-62b720230418 4/18/23, 20:04 bp-62aabcf9-fb69-4fac-8fe0-5f67a0230418 4/18/23, 20:04 bp-6f3c1adc-3e38-4bec-a37b-6ed390230418 4/18/23, 20:04

I'm using Firefox in Ubuntu 22.04.2. I recently update to 112.0, then 112.0.1

With both versions, the scroll bar is not available on some sites which used to work in previous versions. Items which are outside the initial viewing area are not visible.

Is anyone else affected by this issue?

Crash report submitted bp-37f84164-6125-4ae1-9e55-8a8200230225. Started happening about once a day over last few days possibly since 110 FF update (Ub kernel was also updated a few days back) Have to do a hard power off & restart

When I start entering an address or a search term into a new tab or new window I'll get "Search with Amazon" as top suggestion. How can I remove "Top Sites" suggestions on recent Firefox versions?

https://support.mozilla.org/en-US/questions/1285677 the solution proposed here, is not working anymore.

When i try to play videos on YouTube or other websites the video will only play a few frames and then stop.

I have tried going into troubleshoot mode but it did not help. I am using Linux.

I have different login forms on different sub domains so I always get a huge lists of different logins. and also I get my password for the basic auth from the web-server on my login form.

I also consider this as a security risk when different sub domains belong to different parties and I accidentally put my password into the wrong form.

Can I config Firefox the way that I get only passwords in the list that match the exact url or at least the (sub)domain?

Another Question As a Web-developer can I do something that my client don't experience such a mess (like giving the login form a special id so passwords are restricted do this particular form.

Hi! I'm sorry if this is not the correct topic for this question, but I'm having huge trouble surfing the community forums of Mozilla. Could you please help me to understand what is the correct community forum to talk with other users about Firefox Relay service? Or a generic Mozilla community forum...

I need the community's help for technical purposes with the mentioned service.

Thank you very much for your patience. Noè.

So I have this extremely annoying issue. Almost every time I open Firefox on my system, all of my add-ons get disabled. There is no pattern to when it will happen either. Sometimes I can open it 2 or three time without a problem, other times its every single time, and to top it off all of my saved logins randomly disappear too, as well as some of the settings (namely search bar settings). A simple closing and reopening of Firefox restores the login info, but not the settings. I’ve tried making a new profile, didn’t work. Tired uninstalling Firefox and starting clean, still didn’t work. I’ve checked all my settings, and tried deleting the extensions data in the Mozilla folder. Nothing seams to work, and I don’t have a clue why this keeps happening. I’ve been using Firefox since it was still in beta, and have never had this kind of problem before. Any advice would be greatly appreciated.

Operating System: Garuda Linux KDE Plasma Version: 5.27.3 KDE Frameworks Version: 5.104.0 Qt Version: 5.15.8 Kernel Version: 6.2.6-zen1-1-zen (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor Memory: 15.5 GiB of RAM Graphics Processor: AMD Radeon RX 6700 XT Manufacturer: Micro-Star International Co., Ltd. Product Name: MS-7B79 System Version: 3.0

Firefox 111.0

Same as this question, but the answer is outdated: https://support.mozilla.org/en-US/questions/839240

Is there a way to do this in the about:config page?

There is an answer about holding `Alt`, but that is a workaround.

I noticed this first when I had to force Google to go into dark mode even though firefox was already in dark mode.

I have searched through some issue reports and have seen a lot of people mentioning that their system theme is not being detected properly. This is not that issue. I can set the firefox "Website appearance" to dark or automatic at which point the UI of firefox itself does do into dark mode so no issues there. However if I go to a website that tries to query 'prefers-color-scheme' and set its theme accordingly it always returns 'light'. This is the case even if I set the 'layout.css.prefers-color-scheme.content-override' to 0 in about:config.

I used this website to test: https://septatrix.github.io/prefers-color-scheme-test/

The issue persists when opening a website in a private window.

Let me know if I need to provide additional information.

-Felix