The old DownThemAll! (up to version 3.0) was a long term recommended add-on, too, and I am happy that the WebExtension now is as well. I would really appreciate your feedback and ideas for improving this add-on together ^_^.Thanks to Scott DeVaney, who first reached out to me, and “zephyr” from the mozilla Add-ons Editors team and maybe others, who reviewed the extension, DownThemAll! is now listed as a Recommended Firefox extension. If there are features or improvements you'd like to suggest, please go to the Support website linked on this Add-On page. show only YouTube Live-chat messages written with Latin (English) characters. Filter messages regarding characters of languages. Visual design close to YouTube's live-chat and video player design, aiming to not change the look of the YouTube website Settings are applied to all open YouTube pages and live-chats immediatly Customizable filter rules, allowing to either enter simple search-texts, or to use more complex options (e.g. View live-chat messages as subtitles for YouTube player

Highlighting of YouTube live-chat messages via a separated chat-box

for showing Hololive live-chat translator messages as subtitles, highlighting English comments, or deleting annoying messages and emoji. The add-on modifies the YouTube live-chat for both live-streams and replay, allowing to either highlight, show as subtitles, or delete chat-messages matching a set of preset and customizable filter rules.

Youtube download plugin firefox