This extension allows you to configure a set of WebApps for easy access within Thunderbird. Each WebApp will open in its own tab in Thunderbird’s main window where it should work exactly as if it was in Firefox. Once you’ve installed the extension go to its preferences from the add-ons manager and configure the set of WebApps you want. It comes with some defaults set up for you to try.
There are a number of other extensions for opening webpages in Thunderbird, these are the features that this extension has that I couldn’t find anywhere else:
- Clicking a link in a WebApp will either open the link in a tab in Thunderbird if the link is to one of your WebApps or your default browser if it is to somewhere else
- Spellchecking works correctly in all appropriate text entry fields in pages
- When the WebApp is loaded the page masquerades as Firefox since many sites (Google notably) send simpler versions to unknown browsers
- Fully restartless, install the extension without needing to restart Thunderbird
The source code and known issues are available on GitHub