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Firefox is not recognizing FNC character coming from the input stream

We are allowing end user to scan 2D matrix barcode using a wedge scanner in our application. We are facing a problem where different elements of the bar code are not gett… (read more)

We are allowing end user to scan 2D matrix barcode using a wedge scanner in our application. We are facing a problem where different elements of the bar code are not getting split into the application. On investigating this further, we found that Firefox browser not recognising the FNC character(input character 29) coming from input stream (barcode scanner in this case).

Asked by Alpesh Sanghvi 2 weeks ago

Answered by Alpesh Sanghvi 5 days ago

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Firefox doesn't use the full screen under landscape mode

I have a vivo pad 3, and when I'm using it in landscape mode, the firefox app would only occupy part of the screen, leaving the two sides empty. It used to work fine and … (read more)

I have a vivo pad 3, and when I'm using it in landscape mode, the firefox app would only occupy part of the screen, leaving the two sides empty. It used to work fine and I don't know what made it to behave like this since I didn't touch the settings, and no other app is like this.

Asked by bowencui36 4 months ago

Answered by maxwell1234 3 months ago

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Media Player Support

To whom it may concern, I have attached a picture of the error message I get when trying to play a video. I know the website is not at fault as I can use your competitor… (read more)

To whom it may concern,

I have attached a picture of the error message I get when trying to play a video. I know the website is not at fault as I can use your competitors browser (Chrome) and the videos play with no issue. I have also tried a few media player extensions with no success. Please help me find a solution so I do not need to use another browser. Thanks

Sam [email address]

Asked by Sam Rietmann 1 week ago

Answered by TyDraniu 1 week ago

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what the hell is this [expletive]

as title says, what the [expletive] hell is this [expletive], why the [expletive] is it enabled by default and how the [expletive] hell do I get rid of this [expletive] … (read more)

as title says, what the [expletive] hell is this [expletive], why the [expletive] is it enabled by default and how the [expletive] hell do I get rid of this [expletive] [expletive]

Asked by killer93551277 1 month ago

Last reply by Paul 1 month ago

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History wiped on exit with options not working as per requirements.

Ok so I usually choose these option to remember history and from time to time delete Browsing & download history and Temporary cached files and pages. https://asset… (read more)

Ok so I usually choose these option to remember history and from time to time delete Browsing & download history and Temporary cached files and pages.

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-28-08-45-55-a5277f.png

Note: I have "Open previous window and tabs" ticked in general settings which also has a restore previous session option in the history menu. This brings back previous session with tabs etc as is when I close FF. https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-28-08-45-51-cf2daf.png

I thought I could automate this on exit but don't think its working right. So I change the option to "use custom settings for history" and tick all three options:

Remember browsing and download history Remember search and form history Clear history when Firefox closes For "Clear history when Firefox closes" I ticked Browsing & download history and Temporary cached files and pages. https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-28-08-45-43-b10213.png

The issue is the restore session option is missing and FF opens with all previous tabs gone. I am frankly not even sure what else is missing such as cookies, site data etc. Is this meant to work like so?

Asked by Mrsash 3 months ago

Answered by jscher2000 - Support Volunteer 2 months ago

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system blocked by intruder

I am running an iMac that is about eight years old.This afternoon my Firefox browser was taken over by a "warning" from "MacOS security center" that I should go to THEIR … (read more)

I am running an iMac that is about eight years old.This afternoon my Firefox browser was taken over by a "warning" from "MacOS security center" that I should go to THEIR macOS support site to get my system unfrozen. The number they give is 1-877-xxx-xxxx. I cannot get this intruder to go away, even by restarting the computer.

Asked by jpdough37 2 months ago

Answered by Paul 2 months ago

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Youtube broken since 141 update

Since 141 update I have constant problems with youtube. Page does not load at all or loads only partially. Icons on sidebar are broken, youtube logo is black. I tried dis… (read more)

Since 141 update I have constant problems with youtube. Page does not load at all or loads only partially. Icons on sidebar are broken, youtube logo is black. I tried disabling ublock and greasemonkey but it did not help. Refreshing page multiple times and using ctrl+f5 sometimes helps but issue returns often, every few videos/visits. Clearing cookies helps but only for few hours and then issue returns.

Is it related to WebGPU support that was supposed to be added in 141? Can I disable it somehow?

Asked by Piterk 2 months ago

Answered by Piterk 2 months ago

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Back button closes tab when no previous page

Prior to the 6/16/25 release, hitting the back button on the three button control on a page with no previous pages would open the home page without closing the current ta… (read more)

Prior to the 6/16/25 release, hitting the back button on the three button control on a page with no previous pages would open the home page without closing the current tab. After the update, it closes the tab before opening the home page. This was useful for quickly opening multiple tabs, as well as preventing accidentaly closing a tab. Please revert this change, or make it a setting.

Asked by wwarfel123 3 months ago

Answered by trs3 2 months ago

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viewing tabs

Is it possible to view the contents of two tabs simultaneously? I have been in many situations where it would be very helpful to view two different web pages side-by-side… (read more)

Is it possible to view the contents of two tabs simultaneously? I have been in many situations where it would be very helpful to view two different web pages side-by-side to more easily make comparisons. Opening a new window and viewing them side-by-side is similar but being able to pick two tabs to view in one browser would be a lot faster and easier to control.

Asked by emathis01 3 months ago

Answered by emathis01 3 months ago

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What with these HUGE cookie file sizes?

I took a look today and I had 237 MB in cookies! This was after clearing the cache of all files. I've only had this (new) machine a couple months. Short version: Sites … (read more)

I took a look today and I had 237 MB in cookies! This was after clearing the cache of all files. I've only had this (new) machine a couple months.

Short version: Sites have "cookies" from 200kb to as much as 34MB! For many of the sites over 3MB I have no account and have visited them only briefly.

To be clear, I don't care about the space being used. It's trivial. But what the heck is FFox storing and calling it "cookies"? Last I checked, a site was still limited to 4K size cookies and perhaps 50 per domain. So how are we getting to MB+ sized "cookies" per site? Again, the cache was cleared, so what's left aside from trivial cookie files of <4KB?

Desktop; Windows 11; Firefox 139.0.4 64 bit

Asked by MozzieBob 3 months ago

Answered by MozzieBob 3 months ago

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Video still auto plays even though AutoPlay is blocked for both Audio and Video

On certain websites , the audio and video still auto play even though the option, "AutoPlay" is blocked for both audio and video. Please see the attached screenshot wh… (read more)

On certain websites , the audio and video still auto play even though the option, "AutoPlay" is blocked for both audio and video.

Please see the attached screenshot which shows that auto play is blocked, it is circled in red. While the video has auto played, circled in orange with a timestamp of 17 seconds being played prior to it being manually stopped.

Please fix this issue.

Asked by LimuxSpring 3 months ago

Answered by LimuxSpring 3 months ago

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Essentials disappear when closed - return on restart

Hii. Amazing browser tho, whenever i pin something on top or chuck it into essentials - when i close that tab - it disappears (and reappears on browser restart) - i could… (read more)

Hii. Amazing browser tho, whenever i pin something on top or chuck it into essentials - when i close that tab - it disappears (and reappears on browser restart) - i could not locate any setting pertaining to essentials that would stop that behavior (ideally when i close the pinned/essential tab i would love it to stay there as a bookmark - anyone know of a way to achieve this?

Asked by flos 3 months ago

Answered by Denys 3 months ago