@UserBB4464 @Mattches I am removing it completely and to see if that makes a difference, because disabling did not change it - I disabled all extensions.
Well, I see blank screen after a while of browsing with youtube. Here is how it looks like (and it blinks). This is Brave nightly build though:
I had mac freezes too in current stable builds. In both builds CPU goes high when surfing video related sites.
For anyone that had Grammarly installed and have uninstalled/disabled it but are still seeing performance issues:
- Please try cleaning your cache/browsing data as the extension may have left some ābad dataā cached that cause the issue.
- Try disabling Hardware Acceleration (
Settings --> Additional --> System --> Hardware Accleration) and see if performance improves. - Try creating a fresh profile (
Menu --> Create new profile) and see if the performance issues persist.
Was having issues in the last few days with my Browser. noticed HIGH CPU and Memory spikes with my computer and my fan was running hard. I have a gamer laptop (Asus ROG) and the fan never runs hard unless Iām doing something heavy like gaming. For whatever reason, its been laboring while using BRAVE.
Deleted Grammarly (as some in this thread have suggested it may be the cause of the issue) and all seems back to normal now.
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It aināt Grammarly. I donāt use it but look at this. I didnāt see this until Version 1.12.114 came along.
@KoHoSo,
Can you please try what i suggested above and see if one of these issues is causing the uptick in resource usage?
@KoHoSo how about if you use the Hamburger menu and pick More tools => Task manager? would be great to see a snapshot of that if youāre willing to share 
removed grammarly and all seems fine now.
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Quick update for folks who had disabled or removed Grammarly - the team is aware of the issue and are working on a fix
Source:
I can confirm that removing Grammarly I no longer see CPU hogging and Brave on Mac seems to be stable again (based on 1/2 day usage).
Actually brave by default runs in the background so that it can show you pop up ads when not using the browser.Best option will be go to the task manager and kill the background process of the brave browser.
Hope it helps.
Seems to be stable with Grammarly removed. I reported that to them when I removed it from my browser.
Disabled Grammaly, working back to normal now for me! 
Grammarly reports theyāve released a new version with a fix 
for folks wanting to try enabling again
Grammarly shared the following with another Brave employee:
It appears the problem was related to third-party cookies being disabled in some browsers, which caused the reports of high CPU usage
Iād love to do that but, every time I recreate the conditions that cause Brave to begin hogging RAM and CPU, my whole computer crashes so thereās no way to save a relevant screenshot. I can tell you this from what I could seeā¦the trigger seems to be when I open up new tabs of groups I follow on Facebook. This happened earlier today and I had all of my extensions turned off. Vintage Ads (1920-1990) was registering 73.2% of my CPU and RimEats (a group about restaurants where I live) showed 72.3% at the same time.
I can also add that I have tried to begin the first suggestion @Mattches made about clearing my cache. To remove about 400 MB of stuff is taking forever (40 minutes so far) so you will just have to wait to see if that or creating a new profile will work. I am trying though and will report as I can as Grammarly is not the fix for my situation.
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@KoHoSo Definitely understandable! Are there any extensions you do use? The problem in Grammarly was a content script issueā¦ itās possible you may be running into a similar issue if you are using some other extensions
You should be able to DM me the extension list (if youāre using any) if you didnāt want to share publicly
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Just to be clear, when trying again earlier today, I had already turned off all extensions before proceeding. I should also add I double checked the setting @Mattches mentioned and, as is usual for me, hardware acceleration was off.
Just in case it still matters, my extensions are very few since Brave does so much on its own.
Alternate Tab Order
BetterTTV
Bitwarden
Fullscreen Homestar Runner (keeping until Flashās final breath 
)
Google Translate
Cache clearing finally completed. I am now waiting for a similar number of Facebook notifications to come up to see if that fixed the issue or not.
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@clifton I can report this has resolved the issue and Grammarly is no longer an issue and they work great together once again. Thank you for jumping on this as quickly as you did the Brave Team.
The problem still exists including being to the extent that I can never get a screenshot because brave hogs up so much CPU that my PC freezes. As @Mattches suggested, I completely cleared my cache. Didnāt work. I created a new profile and, again, shut off all extensions. Didnāt work. In fact, before freezing, I saw one open tab claim it was using 101.7% of my CPU. I should also add, on this most recent attempt in the new profile, I did not add in my usual pinned tabs and even had fewer Facebook pages open than previously attempted. It still wonāt stop this behavior. Before we go down another usual road, I did a complete scan with both Panda and the online version of Bitdefender and both say my computer is free of malwareā¦no surprise since I also have Vivaldi, Firefox, and Google Chrome installed, and all run with no problems until whatever this is going on related to Brave overwhelms my PC. And again as a reminder, I have hardware acceleration turned off.
Soā¦whatās next? Do I need to rip out Brave including all its registry entries and try to start from scratch?
@KoHoSo,
May seem weird, but can you try disabling any/all Rewards features briefly and see if this has any effect on performance?