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.
