Nazeka has added many options since it was first created, and they're documented within the options page. The following is an example of what options it has:

Enabled: whether to search pages for text
Compact: definitions on same line or with linebreaks
Show original text: shows the string of text that nazeka used to look up a set of definitions
Super border: add an additional level to the double border
Fixed width: always use maximum width width, don't shrink to small contents
Search length: maximum length to search for words
Matching mode: what kinds of alternative lookups to display
Strict matching for alternative matches: if true, alternative lookups of hiragana strings will not produce definitions that are not at least usually kana (the longest lookup will always show all possibilities)
Lookup popup scale: zoom factor for entire popup
Lookup popup width: maximum width for the lookup
Lookup throttle: minimum milliseconds between the start of lookups
Colors: the colors of the popup
Font override: font override for the whole popup, max priority but will fall back to default fonts for characters not in the font override
Font override (highlighted text only): for the main spelling of a definition

Building

Build process requires python and lxml, or an existing copy of the extension to rip JMdict#.json from.

Copy the appropriate manifest.json from etc/ (either etc/firefox/manifest.json or etc/chrome/manifest.json) into the root of the repository
Download JMdict.gz from http://www.edrdg.org/jmdict/edict_doc.html
Convert it to json with etc/process.py
Move the output to under dict/ so that [...]/dict/JMdict1.json and others exist in that location relative to [...]/manifest.json
Make sure every .json file is listed as available to the extension in manifest.json - if jmdict added a lot of words, there might be more than 11 files now
Package as an extension for your browser of choice, or load it as a temporary/indev extension using your browser's development tools

readme.md

Options

Building

Copyright and License