Subscription
Routine: Back up Bookmarks manually, and save those bookmarks as a .html file to some external storage.
Use a good password wallet. Routine: Back up your password wallet ("pw") data, and save that data to some external storage. BB has a built-in password function, but users fail to respect their need to maintain backup. Failure to make a routine of backing up an Internet browser users's pw-combo data leads to trouble, and other BB users suggest using something other than the built-in BB pw wallet function.
Brave Browser is based upon Google's Chromium engine. The Chromium engine selected by Brave Browser developers, is "de-Googled" - and then to that, various creations and tools are assembled bu Brave.
Some Brave Browser development occurs at GitHub:
Ad-Blocking
AdBlock filter developers and Brave Browser have a working relationship. I am uncertain about what would be an exact formal relationship, if any, between AdBlock Plus and BB.
A BB team member, Fanboynz, who participates in the Brave Community, is apparently the author, or one of the author's, of Easylist.
Extensions
You may choose some extensions from among several add-on's / extensions acquired from the Google Chrome Web Store. But on occasion, there may be an extension that is problematic.
Disabling and removing extensions, followed by installing each extension one-at-a-time to be tested on its own, usually finds the troublesome extension.
Often, an issue that a Brave Browser user has with an extensions, is reported to the Brave Community, where you may observe the proceedings. Facebook's WhatsApp Web, is an example:
Facebook Not Working Consistently
I have not looked to see the status of that problem, since 1 year ago. (I do not use WhatsApp Web.)
I recommend learning as much as you can about the Brave Browser Settings. Make notes. Keep bookmarks of the URL addresses for various Settings windows, such as: