There are some recommendations in Appendix B: Firefox Add ons · ghacksuserjs/ghacks-user.js Wiki.
… untimely appearances of hundreds of unwanted tabs - Firefox stops responding before the extension can be disabled - it’s necessary to manually remove the extension from the file system. …
Also: see this month’s post from @amyt (Community Manager for Add-ons and Marketplace) – and other Tab Groups-related posts – under the January 2017 topic begun by Tab Groups users @irvin:
- Concern about WebExtensions exclusive strategy from add-on authors and users