Comment by mschild

The web search feature isnt great. With the bridge youre unecrypting the emails and letting Thunderbird have full access so its as good as whatever Thunderbird (or other programs) have implemented.

Proton websearch is by default email title, sender/receiver only. You can enable full body search but Proton will download your emails to your browser so the search is local. They dont support server-side body search. If you have thousands of emails, youll need to download those first.