Choose Quit or Force Quit to stop the process. A browser cleaner tool will do all that along with clearing your cache and deleting cookies , too. Is your speed test showing you that you have slow internet on Mac? Try resetting your router or moving your computer closer to it. Bookmarking tabs and organizing them within folders on your bookmarks bar is a great way to keep all your frequently and recently used tabs readily accessible, without slowing your Mac down.
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