10ten Japanese Reader (Rikaichamp)

Quickly look up Japanese words on any text page by activating the add-on from the toolbar (you may need to use the Extensions menu to pin the icon to the toolbar) or pressing Alt+R.

Features:
• Pitch accent information
• Dictionaries that update automatically twice a week
• Recognition of a wide range of grammatical forms and characters (e.g. 食べてた, 分からん, 知らん, じーちゃん, 頑張ろー, そーゆー, ぬ verbs, とく・どく forms, causative passive, vs-c verbs like 兼した, and characters like ㋕, ㌀, ㋿, 𠏹沢, and many more)
• Translation of Japanese numbers into Arabic numerals (e.g. 13億5千万 into 1,350,000,000)
• Translation of yen amounts (e.g. 100億円, 8万8千円) into a local currency
• Translation of Japanese-era years into Gregorian years (e.g. 昭和５６年, 平成三十一年)
• Translation between 畳/帖 measurements and square meters (e.g. 四畳半、12.6 帖、25 平米 etc.)
• Translation of shogi moves (e.g. ☗８三銀引成)
• Support for the widest range of Web content (Google docs, YouTube subtitles, vertical text, SVG images, hidden text etc.)
• Support for non-English dictionaries (unfortunately no Japanese-Japanese dictionary is freely available yet)
• Up-to-date kanji data including educational and kanji kentei levels, reworked kanji components etc.
• Many settings to customize to your needs
• Localization into Simplified Chinese and Japanese
• Automatic preview of name entries when there is a better match in the name dictionary

Version 1.21.0 changes
• Added stroke animations to the kanji tab!
• Fixed handling of shadow DOM content in Chrome 128+
• Fixed matching of 0年

Version 1.20.0 changes
• Extended the support for honorific speech.
◦ Added imperative for くださる
◦ Added addtional forms of ます
◦ たら・たり and て-form
◦ Imperative
◦ Added respectful speech
◦ Continuous form (ていらっしゃる, てらっしゃる)
◦ なさる
◦ になる
◦ Added humble speech
◦ Continuous form (ておる, とる)
◦ 致す
◦ Fixed recognition of irregular verb forms of 宣う
• Added support for irregular verb forms of 給う.
• Fixed recognition of continuous forms of verbs with irregular te form.
• Added supported for doing unit conversions to imperial units.
• Added links from WaniKani annotations in the words and kanji tabs to the corresponding page on the WaniKani homepage.
• Fixed a condition that could cause some preferences to be overwritten causing, for example, the puck to suddenly disappear.
• Fixed duplicate matching of names with both 新字体 and 旧字体.
• Fixed display of matches on search-only forms so they don't appear as part of the entry.

Version 1.19.0 changes
• Made it possible to change tabs in the popup by swiping horizontally.
• Bundled fonts used by the popup to provide consistent display and avoid issues with sites that patch system fonts.
• Changed puck behavior to no longer hold the popup window like a regular mouse event would.
• Made copying to the clipboard include rare headwords again when not using simplified copy mode.
• Made the popup no longer show when tapping on text boxes and other interactive elements.
• When searching using just kana (e.g. し and ヤク), made kana matches be prioritized.
• Fixed sorting between various deinflected results so that 進む appears before 進ぶ when looking up 進んでいます.
• Made the popup update after the database update is complete.
• Made senses no longer be restricted when matching on search-only headwords.
• Fixed translation of odd numbers with digits and multiple powers of ten like 11,786百万円.

Version 1.18.0 changes
• Made the puck persist its position, orientation, and active state between pages.
• Updated the clipboard copy feature:
◦ Added a new setting to copy a simplified version of the entry that may be more suitable for making flashcards etc..
◦ Definitions are now separated by line breaks.
◦ Rare headwords are excluded from the result unless we matched on them.
• Fixed a case of 10ten not looking up text with ruby correctly in Ttsu reader.
• Stopped popup being inverted when Wikipedia's experimental dark mode is enabled.

Version 1.17.1 fixes
• Fixed support for Google Docs.
• Improved rendering of source language information.
• Added localization and handling for new rk (rarely-used kana form) tag.

Version 1.17 includes
• Added option to show Bunpro vocabulary and grammar labels next to words.
• Added localizations for newly-introduced field tags.
• Fixed slow lookup for long text spans.

Version 1.16.1 includes
• Enabled Manifest Version 3
• Made the options page show up in a new tab
• Lookup fixes
◦ Fixed recognition of words that end in half-width numerals like 小1
◦ Added parsing for ill-formed numbers like 39,800万円
◦ Made matches on search-only headwords show the search-only version too (e.g. 磨ガラス, ペイチン)
◦ Hid the \"usually kana\" annotation when no kanji headwords are shown
◦ Added ability to recognize (deinflect) a few more irregular verbs like ございません and くださいます
• Keyboard fixes
◦ Added handling to avoid the x key being assigned to both closing the popup and expanding it
• Other bug fixes
◦ Fixed the popup changing width in some cases (e.g. when tabs are hidden and scrollbars are configured to always show)

Version 1.15.0 includes
• Collapsed popup window to only show the most relevant results by default
◦ You can restore the old behavior by choosing \"Expand all entries → Words\" from the settings screen
◦ You can view other entries by scrolling the popup window or by expanding it to show all entries by clicking the downward triangle button or pressing x on the keyboard
• Popup shows kanji details for all kanji in the longest matched word
• Setting for changing the font size of the popup
• Options page support for dark mode
• Option to disable looking up words by tapping on them on touchscreen devices
• WaniKani level data. This can be enabled from the options page under the \"Popup style\" and \"Kanji dictionary\" sections.
• Handling for kanji incorrectly encoded as radicals
• Handling of pages with elements and nested