Every now and then this tab will open itself in my browser in batches, and idk whats causing it (TL;DR at bottom). 

  
This has happened a few times in total:

21/06/2026 - it had a spree of opening these tabs in groups of 3 in a new window (Times: 12:01am, 12:03am, 12:08am, 12:19am, 12:44am (6 tabs here), 1:06am, 1:47am, 1:58am, 2:32am), 

11/07/2026 - 1:15am (2 tabs plus a blank tab in a new window), 9:59pm (3 tabs in an existing window)

When it first happened, I had pirated a game recently, but it was from a decently reputeable site I have used plenty of times before and never had any issue with and that was over a week beforehand, and it had all happened while i was asleep, but left the computer on, so i did not click on any funny links to open the tabs. 

The second time, i once again have not installed anything recently, and I do not believe i had clicked on anything. And this most recent time, the account wasnt even active when it happened, while i had not signed out, i was logged into another account on the computer when it had happened, i only switched back accounts about 15 minutes after it happened. (All of these instances were in the same account)



I had a quick trouble shooting check with chatgpt, and it told me to check task scheduler, where i did not find anything yet (it got me to turn on history or smth, but idk), I ran a quick malwarebytes scan and it picked up nothing, and windows defender also had nothing in detection history. I am running the classic firefox + ublock setup for my browser, so i find it unlikely I'm clicking on ads somehow, i may not be the sharpest tool, but i like to think i can tell the difference between ads and real links. Plus all of my extensions don't seem too suspicious, at the very least they all have the firefox stamp of approval thing.

If theres anything else i can give that might help identifying what is wrong, please dont hesitate to ask, as while it isnt particularly impactful, i dont like knowing i have something malicious on my computer and not doing anything about it.

  
TL;DR  
Scam tabs open at seemingly random times in batches on several occasions, first about a month ago, and twice in the past 24 hours, none in between, malwarebytes and windows defender have picked up nothing, nothing else seems out of the ordinary, using firefox+ublock.

Random scam tabs opening on my browser sometimes.