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CloseReview for rikaichan by Firefox user c4862a
Rated 4 out of 5 stars
The developer, Polarcloud, posted this information on their website (https://www.polarcloud.com/getrcx/)
Alternatives to rikaichan that work with Firefox 57+ (Quantum):
https://addons.mozilla.org/en-US/firefox/addon/rikaichanext/
https://addons.mozilla.org/en-US/firefox/addon/rikaichamp/
To create your own collections, you must have a Mozilla Add-ons account.