Is Twitter Filter safe?

Filter Twitter/X timelines with custom rules that mark, hide, or block matching tweets.

This extension lets you create rules based on tweet content and account properties such as follower count, account age, bio keywords, username patterns, and verification status. It can mark matched tweets with a yellow border, hide them, or trigger an automatic block with delay and undo, and it supports importing name lists plus exporting or importing rules. Optional rule sharing lets users publish and subscribe to rule metadata, while tweet filtering runs in the browser.