Firefox – How to stop the Browser from automatically opening a new window of ad.adsmatte

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when i load the SO and when I click login it opens a new window for ad.admatte.com,when i click questions/Tags or any option available on any site like this it is automatically opening a new window and loading the ad.adsmatte.com.I don't understand whether it is a Spam/Virus/PUP

Did a full scan using the Windows Bit Defender didn't reveal anything.

Did a scan using the adwCleaner and it also didn't display anything.

Finally did the Firefix browser reset and that also didn't result any outcome

[Update]
Tried the safe mode using network but instead the os loads the safe mode using cmd prompt.

Tried the Windows Repair using the advanced settings but got Pc failed to start windows repair.

Tried the Firefox in safe mode(Add-ons disabled) and still the new window with Adsmatte.com opens for every click.

I am also facing the same issue in the mobile as well for which they replied as the router itself is infected and I am supposed to hard reset my router for which I find it risky to do it all by myself and may end up in another situation.

Best Answer

It seems as though you have a rather nasty plug-in or extension installed. Things to try:-

  1. Start Firefox in safe mode (firefox -safe-mode) and see if the problem persists.
  2. If safe mode stops the problem, start normally and disable all your extensions.
  3. If the problem returns change all your plug-ins to Never Activate (note the previous state first).
  4. If the problem is still there, remove Firefox completely and install from fresh.
  5. Otherwise, restore plug-ins or extensions one at a time until the problem reappears, then remove the problem add-on.
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