Hopefully, the decision makers at Lastpass have a broader scope than @jpenny84 has. The Brave browser is not just another fork by another 'hacker'. Brave tries to change the revenue models of the major advertising networks and content suppliers into a system that is not intrusive to the user, gives the adverting companies their share and lets the content providers earn what there readers/users grant them. Imho an idea that deserves to be tested, proposed by someone who's given us large parts of the internet as we experience it today.
There's plenty of articles and discussions on the net about this concept, both pro and con. Please read some of those before posting comments like "I don't see this browser going far because ...". Currently, I am using an ad blocker, because ads often are too intrusive, they sometimes endanger my system and often try to track me. I know that's not fair and why, but the current revenue model on the net is corrupt and needs to be replaced. Brave tries to do that and I'm willing to test their ideas. I'd expect Lastpass to support me in that by supporting the Brave browser. Their idea is close to Lastpass' roots. If they will not, I'll consider to leave Lastpass for 1password. With pain in my heart.