Slow flash on speedtest.net compared to Chrome.
When I left-click on the speedtest.net flash window and drag it, the animation moves a bit choppy / stutter compared to Chrome which is smooth. This problem is the only problem that keeps me from using Firefox.
Please help.
Thanks.
Modified by Primordiarch
All Replies (2)
Does this happen in Safe Mode? Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:
- Click the menu button
, click Help 
and select Restart with Add-ons Disabled.
If Firefox is not running, you can start Firefox in Safe Mode as follows:
- On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
- On Mac: Hold the option key while starting Firefox.
- On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
(you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.
To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.
When you figure out what's causing your issues, please let us know. It might help others with the same problem.
See also:
You can check for problems with current Shockwave Flash plugin versions and hardware acceleration in Firefox and try this:
- make sure you have the latest Flash version:
http://www.adobe.com/special/products/flashplayer/fp_distribution3.html - check for updates for your graphics drive drivers
https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration - disable protected mode in the Flash plugin (Windows Vista and later)
https://support.mozilla.org/kb/adobe-flash-protected-mode-firefox - disable hardware acceleration in the Flash plugin
https://helpx.adobe.com/flash-player/kb/video-playback-issues.html - disable hardware acceleration in Firefox
https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
See also:
Modified by cor-el