When the user is prompted to grant the extension permissions to content on trello.com as well as to their tabs, the user may want more information to understand why those permissions are required. Please add such an explanation to the README file, or ideally, to the extension's homepage on the Mozilla Addons site.
Terrific point. This was originally developed as an internal tool, and thus the users had an implicit trust of the extension, but that's not the case in the world at large. I'll add this to the next release.
When the user is prompted to grant the extension permissions to content on trello.com as well as to their tabs, the user may want more information to understand why those permissions are required. Please add such an explanation to the README file, or ideally, to the extension's homepage on the Mozilla Addons site.