TiddlyFox is an extension for Mozilla Firefox that enables TiddlyWiki to save changes directly to the file system. TiddlyWiki is complete wiki packaged as a standalone HTML file; see http://tiddlywiki.com/ for more details.
TiddlyFox can be installed from Mozilla's Add-ons page:
https://addons.mozilla.org/en-US/firefox/addon/tiddlyfox/
However, due to the duration of Mozilla's approval process, you will often find a more up to date version here on Github:
https://github.com/TiddlyWiki/TiddlyFox/raw/master/tiddlyfox.xpi
The shell script build_mac.sh builds tiddlyfox.api successfully on Mac OS X.
To make it easier to work on the extension, you can configure Firefox to use the unpacked, development version of the extension. To set it up, edit the file [email protected] to contain your local path to the TiddlyFox folder, and then drop the file in your [firefox profile folder]\extensions\ folder.
This extension started life as the sample code accompanying this MozillaZine Knowledge Base article: http://kb.mozillazine.org/Getting_started_with_extension_development