Shut the Facebook Up: a Chrome extension that removes Facebook Chat.
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Open up Chrome's extension page by typing
chrome://extensions
into your URL bar. -
Be sure the checkbox next to "Developer mode" is checked!
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Use the Download ZIP button on this page to get the archive.
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Unzip this archive. You should have one folder, probably named
stfbu-master
. -
Drag the folder into the extensions page until you see the Drop to Install note.
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Drop it.
Visit Facebook using Chrome and notice that the chat sidebar isn't there any more.