Browser opened automatically but you don't know who did it?
Here comes Browser Popup Detector:
It is a browser hijack detection app helps you catch the culprit of randomly browser ad pop-ups.
It is also an adblock browser blocks banner and video ads.
Uninstall other third-party browsers and disable all system browsers. Only keep 'Browser Popup Detector' as the only one browser on your phone. (This step cannot skip, because malicious apps can specify whatever browser they want to launch, Browser Popup Detector cannot catch the URL if it opens in other browsers.)
How it works:
1. Indicate the browser is opened by which app by displaying its name and icon so you can easily identify.
2. Click the app info will directly jump to the app details page.
3. Uninstall the app to terminate the browser ad pop-ups!
If you have any question or suggestion, feel free to contact me at email@example.com. I'll reply to you asap.