If you are going to go the "Download Chrome Extensions" route, look into Session Buddy. It is a very powerful session manager. It keeps a history of your closed windows, even after closing the browser. Very handy for recovering from accidents.
Controversial posts made by lando242
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Opera for WindowsRE: closing window, lost pinned tabs
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Opera for WindowsRE: How to import Favorites from Windows Edge to Opera?
Settings > Browser > Import bookmarks and settings
- Opera for Windows
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Opera for WindowsRE: Mouse forward/back buttons respons twice after 33 update
Your install is borked. Reinstall it. Backup your data first.