Firefox Community Forum

Wanted to change the shortcut Alt + number to Ctrl + number to go to Tab 1-8 (got used to it in Chrome and Edge).

Found this https://support.mozilla.org/en-US/kb/customize-keyboard-shortcuts-firefox and wanted to try it. about:keyboard did not work and showed that the address doesn't look right.

Oh yeah, my device is running Linux Mint Cinnamon 22.3.

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

Hi all the people,

I was just surprised to see this in an Apache HTTP log: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Firefox/58.0.1"

This bugs me. My first guess would be that a Webkit based Firefox could not be qualified as really Firefox. Although that, I could imagine a Firefox for iOS or MacOS based on Webkit, may be, but it says it is on Windows, which makes less sense.

I suspect this is a user agent string spoofing, but I just need to be sure (I try to get ride of far too invasive bots, while I’m afraid to disrupt browsing from legitimate web users).

With thanks and my apologizes for such a question which may looks obvious or strange to people who know for sure.

On previous releases of Firefox, when I added the "Open file" button to the toolbar I could click on it and a file browser would open to select a file to load. Now in Firefox 152.0, I was able to add the button to the toolbar, but it is disabled (greyed out) and does nothing when I click on it.

The Ctrl-O keyboard combination works, but I much prefer to use the toolbar button.

I have a home server 192.168.0.240 in my local network. Firefox does not let me in to my own pages. On the address line appears text "Not secure",

I have found no way to get in. I have there REALLY IMPORTANT TOOLS AND MATERIAL and I need it AS SOON AS POSSIBLE !!!!

This is really stupid. I have used these pages until this weekend. I have had this problem many years, but always found some way to make it work. I am NOT going to buy a certificate to every server I have home. it costs $$$$.

At websites, such as Walmart.com, the Firefox screens displayed often do not show choice buttons presented by the vendor. I am using Linux Mint 21 on a desktop computer. The same sites are shown correctly with all consumer choice buttons displayed on Chromium.

Your help is reliant on volunteers. I do not find that acceptable. Sorry! I'm switching to Chromium.

When viewing pdf files created from MS Word (.docx) documents and sent to me I see white lines across some images but not all. This happens with Firefox on Windows 11 and linux mint (various versions). It is present on the images from the file as received and after uploading to a website. The images are OK if viewed using Opera or other browsers but the same problem is present on Thunderbird. The file below has the problem on 2 images when viewed on Firefox. https://www.kass.org.uk/Documents/NewsletterFrom251114/20260304%20March%20Newsletter.pdf I have caused the writer of the article a lot of trouble because I blamed her file which seems to be OK. Can you help? Thanks Brian

Just checking Facebook "download your information" and got this:

```

     {
       "timestamp": 1781017200,
       "label_values": [
         {
           "label": "Date",
           "value": "2026-06-09"
         },
         {
           "label": "Business or organization",
           "value": "Firefox",
           "description": "The business or organization that added you to a Custom Audience"
         }
       ]
     },

```

Is this actual Firefox passing my info to Meta, or some Meta scammer pretending to be Firefox?

On that date, I had Global Privacy Control turned on in Firefox.

Media resource could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_DECODE_ERR (0x806e0004) Details: virtual mozilla::MediaResult mozilla::FFmpegVideoDecoder<62>::DoDecode(mozilla::MediaRawData*, uint8_t*, int, bool*, mozilla::MediaDataDecoder::DecodedData&): avcodec_send_packet error: Unknown error occurred