Thank you for taking the time, to produce the screenshots.
My best guess of the moment …
The hoverzoom.js (Console screenshot) might be a script of the Hover Zoom+ extension; Console message:
Uncaught (in promise) SecurityError: Failed to read the 'sessionStorage' property from 'Window': Access is denied for this document.
at prepareImgLinks (hoverzoom.js:2458:41)
at init (hoverzoom.js:4088:13)
at applyOptions (hoverzoom.js:2609:13)
at hoverzoom.js:2646:17
That extension may be interfering. Test by disabling that (and other extensions); but also remove Hover Zoom+ / HoverZoom, if you have it.
(NOTE: From the Chrome Web Store: “This is an open source version of the original HoverZoom extension which is now overrun by malware and deleted from store.”)
Extensions Tests:
- test by disabling all extensions
- test by enabling each extension individually
- test by uninstalling all extensions
- test by installing each extension individually
- test combinations of extensions
- test order of installation of extensions
Brave is probably somehow frustrating the Google sign-in flow - possibly in regard to accessing the third-party/cross-site storage that Google’s Multi-site Unified Login Eco-System expects. The following Developer Tools > Console lines may be a tell-tale of the sign-in flow problem:
POST
https://accounts.google.com/v3/signin/ /AccountsSignInUI/browserinfor?f.sid-=...
400 (Bad Request)
Short list of Google domain names and hostnames associated with, related to, Google’s Unified Login:
[*.]accounts.google.com[*.]google.com[*.]gstatic.com[*.]mail.google.com[*.]recaptcha.net[*.]workspace.google.com[*.]www.google.com[*.]www.youtube.com
That short list, is from around 120 Google Eco-System domain names and hostnames.
In a Brave Browser New Window, go to: brave://settings/content/javascript and scroll down to the Allowed to use JavaScript section, and there, Add those Google domain names and hostnames.
In a Brave Browser New Window, go to: brave://settings/cookies and, in the Sites allowed to use third-party cookies section, Add those Google domain names and hostnames.
In a Brave Browser New Window, go to: brave://settings/content/braveShields and, in the Shields Down section, Add those Google domain names and hostnames.
So, regarding third-party cookies and Brave Shields, you are effectively rating Google’s Eco-System as Most Trusted.
Brave Browser effectively waving a very detailed ID badge at every challenge, in the Google World Order.
PS. Re the other Console screenshot, Brave Browser is storing cookies.