Set Gmail labels or Gmail filters as tabs
I've recommended this to three co-workers already. Once you try it, you won't want to use Gmail without it
I work with client across time zones. Tabs let me stay on top of each thread without loosing track of who need what.
This extension changed the way I use Gmail. I feel more in control, and my response time has improved a lot.
https://www.sort-gmail-inbox.com/
https://gmail-notes.com
https://www.gmail-auto-label.com/
https://www.gmail-sidebar-resizer.com/
https://www.highlight-emails.com/
https://www.get-my-receipts.com/
https://www.gmail-copilot.com/
https://www.rename-email.com/
https://www.gmail-url-link-preview.com/
https://www.format-email-subject.com/
https://www.gmail-message-preview.com/
https://www.gmail-snippets.com/
