Quickly search on Jisho.org
Allows you to search quickly on Jisho.org by right-clicking on selected text. If you are searching for a single kanji, the extension will navigate directly to the #kanji page on Jisho.org. The extension also adds a toolbar button with a popup for entering text directly, which may be useful when copying and pasting text from another program.
This extension is open source: https://github.com/gbrixey/jisho-extension