In a Brave Browser New Window go to:
brave://settings/content/javascript
Scroll down that javascript settings page to Allowed to use javascript
Click the Add button
Enter [*.]google.com as the site . . . but do not Enable the following:
- Current Private session only
Click the Add button
Repeat those steps for:
[*.]firebaseapp.com[*.]gmail.com[*.]googleapis.com[*.]googleusercontent.com[*.]gstatic.com[*.]youtube.com
And study:
Shields Basics
How do I configure global and site-specific Shields settings?
How do I use Shields while browsing?