Mozilla Firefox

Versions 40 through 49

Firefox 43 is the first 64-bit version.

Application Details:

Version: 40 to 49
License: Open Source
Votes: Marked as obsolete
Latest Rating: Platinum
Latest Wine Version Tested: 4.9

Maintainers: About Maintainership

Free Download Firefox 49.0.2 64-bit direct link Free Download Firefox 49.0.2 32-bit direct link

Test Results

Old test results
The test results you have selected are very old and may not represent the current state of Wine.
Selected Test Results

What works

Browsing web pages, watching YouTube videos (tested multiple quality settings, up to 4K), fullscreening YouTube videos, changing settings, re-sizing the window, entering full screen mode, browser extensions such as uBlock Origin,,,,,, any and all other tested websites.

What does not

The top bar is cut off when the window is maximized, the text on each tab is cut off. Full screen (F11) works fine, however.

Additionally, the top bar has distorted colors when unmaximized, until the window is resized.


What was not tested

I did not test every website on the Internet, obviously.

I did not install Flash to test Flash games.

Hardware tested


  • GPU:
  • Driver:

Additional Comments

Tested with these versions: Firefox 49, 32-bit and 64-bit. 4K video on YouTube had about double the CPU usage compared to native Firefox. That's acceptable, though, and quite niche. 463 out of 555 points on

selected in Test Results table below
Operating systemTest dateWine versionInstalls?Runs?Used
ShowUbuntu 18.04 "Bionic" amd64 (+variants like Kubuntu)May 29 20194.9Yes Yes NoPlatinumAaron Franke 
CurrentUbuntu 16.04 "Xenial" amd64 (+ variants like Kubuntu)Jul 30 20172.13Yes Yes SilverAaron Franke 
ShowUbuntu 14.04 "Trusty" amd64 (+ variants like Kubuntu)Dec 21 20151.8Yes Yes SilverJeff D. Hanson 

Known Bugs

Bug # Description Status Resolution Other apps affected

Show open bugs