Any browser needs cleansing and maintannance at a certain point.
Empty the cache etc. Checking on extensions etc. Update or refresh and ultimately if infested reinstall.
This goes for a chromium based browser like Avast Secure Browser as well as for Brave (also chromium based)
as it goes for Firefox and Firefox based browsers like for instance Mullvad and also the Tor Browser.
Firefox Focus is a browser for Android that automatically will cleanse itself
every time after it has been used and closed.
Works fine alongside Blokada5 on Android for me
(Blokada my ad-blocker app of choice, downloaded from Aptoide)
Avast Secure Browser for Android has a counterpart in SPIN browser, a web filter browser.
But with browsers it is as with puding, the proof of it is in the eating
polonus