KitsumiKitsumi on your Android phone
Chrome on Android can't run extensions, but Firefox for Android can. Four taps and Kitsumi runs on YouTube on your phone, with its own phone layout and a dictionary that works by tapping.
Phone layoutMobile YouTubeNo accountInstall it in four taps
- 1
Get Firefox
Install Firefox for Android from Google Play. Skip this if you already have it.
- 2
Open Kitsumi in Firefox
The Kitsumi page has to open in Firefox, not in Chrome. The easiest way: open kitsumi.org/android in Firefox, then tap this button.
- 3
Add it
Tap Add to Firefox, then Add. That's the install.
- 4
Pick your language
Open any video, then the Firefox menu (three dots) → Extensions → Kitsumi, and choose the language you're learning. Subtitles and the tap dictionary appear right on the video.
What changes on a phone
Phone mode
Kitsumi notices a touch screen and switches on its phone layout by itself. Its menu opens as a full page, sized for your thumb.
Mobile YouTube
It works on m.youtube.com in Firefox, fullscreen too.
Tap, don't hover
There's no mouse, so you tap a word or a line to see its meaning and save it.
On a computer instead?
Kitsumi also runs in Chrome, Edge, Brave and Opera and in Firefox. See every way to get Kitsumi.
Questions
Why not Chrome on Android?
Chrome for Android doesn't run extensions at all, so Kitsumi can't be added to it. Firefox for Android can, and it's free on Google Play.
Does it work on iPhone or iPad?
No. Apple only allows extensions through Safari, and there is no Safari version of Kitsumi.
Does it work on the YouTube app?
No, Kitsumi runs inside Firefox. Open YouTube in Firefox instead (m.youtube.com), and it works there, fullscreen too.
Is my data private on the phone?
The same as on a computer: your words, cards and settings stay in Firefox on your phone. There's no account and nothing to sign in to.
Is it free on Android too?
Yes. Firefox and Kitsumi are both free, with no account and no ads.