I had synchronised with my mobile before the PC was down. So I had all my speed dials in mobile and they came back to my PC opera, but not as big
Okay. At the URL opera://bookmarks, you should have seen them in a speed dial folder for the other device (your mobile device). You could have then just selected all of them (ctrl + a), copied the selection (ctrl + c), went into your (the main one for Opera desktop) "speed dial" bookmarks folder, and pasted (ctrl + v).
So, this looks to be a bug of some random version that I upgraded back then. It doesn't happen anymore, I tried few upgrades and the autorun entry isn't added. Unless it's something entirely else that added it.
If you're using Opera Sync and syncing history, and you delete certain items in history, see this issue that wipes out all your history.
If not, I'd goto the URL opera://settings/clearBrowserData, clear history for all time, goto the URL opera://about, take note of the "profile" path, close Opera, and delete the "History" file in the profile folder. Then, when you start Opera, it'll create a fresh History file that will hopefully work right.
Adblocker is blocking the websites from displaying anything, but how do I stop the tab from opening to start with. For instance, I am reading manga on certain websites and whenever I try to go to the next chapter it immediately opens a brand new tab with a weird website blocked by adblocker. This was not even an issue this morning and only started in the afternoon after I updated my browser. Any suggestions on how to force stop those redirections? I have added the website to the list of blocked redirects and it does not work.
Sometimes - if you don't mind some images not displaying - you can turn off javascript and it will stop doing that.
Then, download the Opera GX installer from https://www.opera.com/download#opera-gx, launch the installer, click "options", uncheck "import data from default browser", adjust all other options as you like, and install.
Then if regular Opera comes back again, it means something else on your system is installing it. It could be bundled with some other security software or you could be experiencing an issue similar (but not quite the same) as this issue.
It should be like a sandbox. Code running inside a browser should never ever get outside the browser. This is basic programming. Say you ran a virtual machine on your computer. No virus in there could ever get out.
Of course it can. It may not be easy, but has happened.
Only with downright stupid programming. What is inside stays inside. Calls to the outside must go through the user.