Check Enable hardware acceleration is selected.

Click on the icon at the bottom-left of the Adobe Flash Player Settings window to open the Display panel.

The Adobe Flash Player Settings screen will open.

Hold down the Ctrl key while you click on the video player and click Settings… in the context menu.

Navigate to a page that shows a Flash video.

It eases memory usage in case of a dedicated graphics card memory.

NoScript allows you to selectively enable and disable all scripts running on websites.įor certain plugins that play videos such as Flash, the content rendering in full screen can be accelerated by hardware.

uBlock Origin allows you to hide ads on websites.

Some extensions allow you to block such unnecessary content for example: See the Set Adobe Flash to 'click to play' on Firefox article for details. To prevent automatic loading of unwanted Flash content, use the 'Ask to Activate' setting in the Add-ons Manager Plugins panel. Many web pages have content you don't really need that uses memory to display.

For more information on starting Firefox in Safe Mode and on how to find which extension or theme is causing your problem, see Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.

In Safe Mode, extensions and themes are disabled, so if you notice a significant improvement, you can try disabling or uninstalling extensions. To determine if an extension or theme is causing Firefox to use too much memory, start Firefox in Safe Mode and observe its memory usage. Extensions and themes Disabling memory consuming extensions and themesĮxtensions and themes can cause Firefox to use more memory than it normally would.

The latest Firefox version includes improvements about memory usage.

Disabling memory consuming extensions and themes.

Firefox takes up too much cpu