Kioku

Name: Kioku
Rating: 5 (1 reviews)
Author: Kioku

By: Kioku

Learn Japanese by browsing the web and watching Netflix!

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Install

Features & Capabilities

Kioku keeps track of your known words and assists you when reading regular websites and watching Netflix. It highlights words you are still learning or don't know yet and displays Furigana over unknown ones. For every website you can view known and unknown word counts. Your learning progress can be imported from Anki.

To analyze a specific text on any website simply highlight it, right click and press "Kioku" in the context menu. Press the 1, 2, 3, 4 keys when hovering over analyzed words to change their learning status. Press the extension icon at the top right (you might want to pin it) to view statistics about the current page.

On Netflix press B to toggle the subtitle sidebar. Press W to toggle the subtitle display. Press A, S, D to go to the last, current or next subtitle.

User Growth & Download Statistics

Add-on

By:

Kioku

Daily users:

Rating:

5.00

(1)

Version:

0.2.0 Last updated: 2022-01-06

Version code:

5345583

Creation date:

2022-01-04

Risk:

Permissions:

Content scripts matches:

www.netflix.com
<all_urls>

Size:

14.92MB

Email:

ki*****@protonmail.com

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-17

Compare stats and ranking:

Ranking

# 39,242 ▼ 226

Other rankings

#248 in learn keyword 25 ▼ 1

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Kioku

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/kioku/

Email:

ki*****@protonmail.com

Is Kioku Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Kioku requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Kioku has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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