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Since updating to 25.0.1, spam windows keep opening up

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Typically, the 2nd window opens if I click on an open page; the 2nd window contains spam (unsolicited ads). I do not know how to stop this. Today, PC Cleaner(?) opened a new tab; other unknown and unrequested tabs "volunteer" themselves. This is an ongoing problem since the last update. Help!!! I have used FireFox for years without any problems, and recommend it to everyone with a computer. Please advise me on how to stop all this unwanted garbage!!!

Typically, the 2nd window opens if I click on an open page; the 2nd window contains spam (unsolicited ads). I do not know how to stop this. Today, PC Cleaner(?) opened a new tab; other unknown and unrequested tabs "volunteer" themselves. This is an ongoing problem since the last update. Help!!! I have used FireFox for years without any problems, and recommend it to everyone with a computer. Please advise me on how to stop all this unwanted garbage!!!

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hello SDMcRoy, this sounds like some sort of adware/malware is active on your system. please try these steps:

  1. reset firefox (this will keep your bookmarks and passwords)
  2. afterwards go to firefox > addons > extensions and in case there are still extensions listed there, disable them.
  3. finally run a full scan of your system with different security tools like the free version of malwarebytes and adwcleaner to make sure that adware isn't present in other places of your system as well.

Troubleshoot Firefox issues caused by malware