DO NOT INSTALL THIS VERSION, IT IS DRASTICALLY OUT-OF-DATE!
Yomichan is a perfect 5/5, but this version is drastically out-of-date and missing critical features. If you are wondering why the settings page looks different to everyone on youtube, here's why. For some reason, the Firefox store is stuck on version 20.5.22.1, whilst version 22.10.23.0 is available on the Chrome store and GitHub. You should instead download the latest version from the Yomichan GitHub instead, with the file name "a708116f79104891acbd-22.10.23.0.xpi". "Thankfully", Yomichan is no longer updated, so it's as simple as installing it and forgetting about it as it will no longer receive updates.

Firefox version of this addon is two years older than Chrome version. I just spend over an hour trying to figure out why I can't import a JMdict Extra dictionary recommended on https://learnjapanese.moe, with nothing online about the error "Error: Dictionary has invalid data in 'term_bank_1.json' for value 'dictionary[0][5][0].type', validated against 'schema.additionalItems.items[5].oneOf[1].properties': 0 oneOf schemas matched".

私たち外国人に言葉を教えるために、これほどまでに美しく便利な道具を作ることに労力を惜しまない日本人に感心します！

An absolutely incredible tool for japanese learners

Must have for every japanese learner. I literally couldn't imagine studying japanese without this. It's so incredibly useful it's borderline unbelievable.

Truly the best out there. Wonderful browsing experience, with a good range of features (especially with anki).