More than a few? Active tabs mean active processes that take up your laptop's RAM and drastically slow down its capabilities. Just close the tabs you're not actively using.
How to Restore Firefox Settings to Their Default Values
All the websites you visit leave behind cached image files, which are supposed to speed up load times, and cookies, which can save you from having to log in over and over. Those are big conveniences if they work the way they're supposed to, but sometimes cache and cookies can cause glitches and slowdowns. Alternatively, you can do this easier and safer with CleanMyMac. Just click Privacy in the sidebar and then choose Firefox from the list. Change the time range to Everything, and you can clear all of the cookies, browsing history, downloads history, tabs, saved passwords, and even autofill values.
If closing tabs and clearing the cache didn't work, it's a good idea to update Firefox and macOS to its latest versions. When Firefox is active, just click on Firefox in the menu and select About Firefox. The latest available update should start downloading automatically. When it's ready, click Restart to Update Firefox and you are ready to go. Updating macOS is easy too. Just launch the App Store on your Mac. Go to the Updates tab and wait till it shows you all the new software versions available. If you see new updates for macOS, click Update and follow the restart instructions.
If the problem persists, check for high hardware resource usage. For basic information, you can use Mac's native Activity Monitor. However, to see the whole picture, get a pro-level app, such as iStat Menus.
- Reset Firefox to default settings (LINUX).
- How to fix common Firefox issues on a Mac.
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If you see Firefox using too much memory or CPU, you need to take some action. It's very likely that one of your installed plugins is the culprit. To check for that, click the Menu button, and then choose Add-ons.
How to Refresh Firefox
In the Add-ons Manager's Plugins panel, you can select Never Activate for each plugin, then restart Firefox and see if the problem is still happening. If the problem is gone, turn the plugins back on one by one, just changing that Never Activate option back to Always Activate.
Restart Firefox each time and then try to recreate the error. Once the problem reappears, you'll know it was likely caused by the last plugin you re-enabled. You can also remove a plugin with CleanMyMac 's Extensions tab, which is actually a lot easier than using Firefox.
In Firefox itself, you have to type about: Mozilla then recommends you change the filename to add an X in front, which will remove the plugin. You can reinstall a fresh copy of the plugin from official sources only! To check your extensions in Firefox, go to about: You can disable extensions here, and then turn them back on one by one, in the same way you just checked your plugins. If you want to remove all your extensions and start fresh, you can click the Remove button or use the Extensions tab in CleanMyMac, which manages extensions, add-ons, and plugins from one place. Preventing Flash content from loading automatically deserves a separate explanation.
Some websites use way too much Flash content, and loading and playing all of that uses up your computer's resources, especially if you keep a lot of tabs open. Luckily, you can tell Firefox to stop loading Flash content by default, until you ask for it. Or press Command-Shift-A, or type about: It all takes you to the same place. Change the dropdown from Always Activate to Ask to Activate. After that, websites will display an Activate Adobe Flash button in place of Flash content, and all you have to do is click that to allow Flash to display it.
But if you're still experiencing troubles, there is more you can do. Read on. Whether Firefox shows you an error message every time you try to launch the app or right when you're in the middle of a working session, there is only one way to fix that — reinstall the application. The easiest way to reinstall Firefox is to quit it, delete the Firefox file from your Applications folder, and download the new version from the official Mozilla website. That will uninstall the application but keep all your user data intact, and when you reinstall a new copy, you bookmarks and passwords will still be there.
Any browser can slow down and become cluttered over time as you install add-ons, build up history, and change settings. Firefox will keep your bookmarks and saved passwords. However, this will delete your installed add-ons and erase all their locally stored data. It will also reset your browser settings to their default values and clear the browser history and other cached data. However, your important personal data will be kept—with the exception of any browser extensions and their data. Firefox stores the majority of user-specific settings and data in a profile folder, a repository purposely placed in a separate location from the application itself.
This is intentional, ensuring that your information remains intact in the event that Firefox becomes corrupted. This handy tool corrects a large majority of common Firefox issues with just a few mouse clicks, saving valuable time and effort.
Reset Firefox preferences to troubleshoot and fix problems
First, open your Firefox browser. Click on the main menu button, located in the upper right-hand corner of your browser window and represented by three horizontal lines.
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- Reset Firefox (LINUX) back to default settings?
- Table of Contents.
- Reset Firefox preferences to troubleshoot and fix problems | Firefox Help.
- What This Keeps, and What It Removes.
Please note that you can utilize the following shortcut in lieu of clicking on this menu item: A confirmation dialog should now be displayed, asking if you want to reset Firefox to its initial state. No action is needed on your part at this point, as the window will close itself and the browser will restart in its default state.
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