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Extensions 
Chrome
Web store
select chrome_id_no,plugin_tag_line,plugin_name,plugin_icon,sitemap_url,oldvsnew_comment from final_chrome_totaldata_sept2022 where MATCH(plugin_name) AGAINST('+chat +overlay' IN Boolean MODE) order by users desc
Chat Overlay for Youtube, Twitch & more
Add live chat from Youtube, Twitch, Restream and more to your OBS as a browser overlay. Feature requests accepted!
Anu Twitch Chat Overlay
Show Twitch chat on top of the stream player. Read chat, send messages, claim points, and more, without leaving fullscreen mode
Twitch Chat Overlay
This extension lets you follow any twitch chat from any other page!
Just put in the channel name, click on Go and you're good to…
TwitchTv Chat Overlay
Displays chat messages over the video stream allowing viewers to hide the chat display (and extend the video player area!)
Live Chat Overlay
Restyle the YouTube and Castr.io popout chat so you can overlay it for livestreams
YouTube Chat Room Overlay
Overlay chat room in YouTube when video is playing in Normal mode, Cinema mode or Full screen.
Chat Overlay
Overlays a chat onto the page, allowing users to pick a name and room code and chat with their friends on a server they provide.