Just found this really nice browser to use with my Max 3. I was using Firefox Lite, but this looks even better from the POV of being lightweight and has the advantage that it's optimized for e-Ink devices.
https://github.com/plateaukao/browser
Normally, it should be available from the app store, but it was just suspended recently according to the author:
"Google suspended my release this weekend, saying that the App should not ask users to download app from unknown resource. However, in EinkBro, I did not do what they claimed. So, I wrote a letter to appeal. Haven't received any response yet."
For now, you can download the apk from GitHub at:
https://github.com/plateaukao/browser/releases