Firefox Community Forum

There was a previous thread but i cannot see that any solution was offered. This is so inconvenient that if i cannot solve this i will be obliged to use another browser

When I didn't know what I was doing, within Settings for Firefox desktop browser for Windows 10 where you can make associations for file types or applications, I began putting choices in that I felt made sense at the time. I don't think I've made the best choices and I would like to change that entire section with the heading Content Type to the defaults that would have appeared in the Action column. Is there a way I can return the defaults only for Content Type without resetting everything in the browser to the state it was first in before I began customizing some areas? Thanks.

Hello,

I have noticed an issue with the download process. Perhaps it can be easily fixed. ( Is this the right place to report? )

Downloading a duplicate of a .tar.xz archive results in a corruption of the name extension, as the suffix should be placed one dot before;

ie. "fileName(2).tar.xz" and not "fileName.tar(2).xz" ;

It actually seamed a couple of times to be a corrupted download.

Thank yoouu

Hello, Today i was working on a friend laptop, i was using the private browser while i was downloading a very sensitive files, after closing the private window i couldn’t find the files is that normal? Also, do you think that the files might be found, or they gone for life? Cuz i don’t wanna my friend to maybe find them one day.

Since around April 2026 , the "Show in folder" option (in "Display the progression of ongoing downloads") does not work anymore when a file is downloaded on a NAS drive . I use a Qnap TS-231P NAS .

Hi, I've recently discovered that Firefox replaces the % with underscore while downloading file.

I've read that question: https://support.mozilla.org/fr/questions/1439267 but there is no answer.

Is there a way to prevent that? I use a online tool I've made myself and the % is used as a separator.

I was for reason having to default to LibraOffice and I really did not like that. I switched to FireFox so that I can open files through this browser instead. For some reason I download the files and it should take me to view the file in FireFox. I cannot view it at all. I wanted to be able to view the files in FireFox and then I can sync it with Google Docs and then open some of my files into google docs and I do not have to deal with LibraOffice. Why can I not view my files?

Hi

I regularly update a JSON file from VMware. In the past (before March this year), when I clicked the link below, and then clicked "save", the file I was viewing was saved, as expected.

link text

Since I tried this in March, it would display the new updated file when I click on the link. I then click Save, and the old file that was last saved months back is saved. Even deleting the file in the Downloads folder still saves the old file data.

I found that if I deleted all cookies and cached data for vmware.com, that the next time the latest file would be saved. I last did that in June. Today, in July, I view the file as dated 18 July, but when saved, the data from 17 June is saved in Downloads.

I'm running the latest Windows 140.0.4 (64-bit) Firefox on Windows Server 2022.

Is this a bug with JSON files? Is there something I need to do? This used to work.

Hi, I'm running into an issue where when I download a CSV-file from a website it's downloading as a pdf when it should be downloading as a csv. If I after the download rename the file back to the csv-extension, I can open it in Excel. Any ideas? I run Linux on my laptop.

Hi,

I recently migrated from Chrome to Firefox. As you can see on the screenshots, I have on Chrome the possibility to download the video I am playing by clicking the three dots. This button is not displayed on Firefox. How can I solve this issue. Deactivating Ublock doesn't change anything.

Thank you for you answers.

Firefox used to save unknown files according to the save files setting. i.e. ask where to save files. Now if opens unknown files as text in a new tab.

How can the correct behavior be restored?

Alternately, can the Linux snap be fixed to allow saving of new file types? {The procedure shown in https://support.mozilla.org/en-US/kb/change-firefox-behavior-when-open-file is not present in the firefox 141 snap.

Hello, We use the following code (in a Dockerfile) to download the latest Firefox for testing.

curl -fsSL -o /tmp/firefox.tar.bz2 "https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64&lang=en-US" && tar -C /tmp -xjf /tmp/firefox.tar.bz2 firefox

Starting with 135.0 the tar command fails with:

bzip2: (stdin) is not a bzip2 file.
tar: Child returned status 2
tar: Error is not recoverable: exiting now 

134.0.2 works: curl -fsSL -o /tmp/firefox.tar.bz2 "https://download.mozilla.org/?product=firefox-134.0.2....

A couple questions: - What has changed? Is there some other way we need to download and uncompress? - Is there any documentation of the supported query params for https://download.mozilla.org

Thanks, Paul

Over the past couple of weeks, when trying to upload something to YouTube, Firefox no longer opens the most recently used folder. Instead, it always opens the exact same folder. I have tried to find a solution to this and I can't find one. Even removing cookies and site data on YouTube did nothing.

I am genuinely confused and would really appreciate some help.

Dear Support,

I have a Bug (in my opinion), that if select Settings --> Downloads "Files and applications - Choose how Firefox handles downloaded files and content." e.g. for PDF -> open in Firefox (P1.png), and I click on a PDF-Link, the File opens in Firefox and is not downloaded (P2.png). In the Settings if I select the Action "Always ask" (P3.png), click on the PDF-Link and choose "Open with Firefox" (P4.png), the File get downloaded too (P5.png). So it is open with Firefox and save File? I think this Action is not wanted.

Kind Regards Tobias