I'll have a Firefox version soon. Here's an example of how I went from PhD to Burma and then some: http://wikitrail.zetabee.com/share?n=wt4bc6884b2a0959.146948...

For xkcd fans, this is the problem I'm trying to tackle: http://xkcd.com/214/

I think you should make it a page action instead of a browser action because there is no reason for it to appear unless I'm on wikipedia.

http://code.google.com/chrome/extensions/pageAction.html

Button space on chrome is valuable real estate. Don't want zombies sucking up the space when not needed. Cool extension though.

I'd use it if you made it a page action.

It is a content script that calls the background.html. The content script only runs on Wikipedia/TVTropes domains. The browser action is just to open the WikiTrail page. This way you can access it from the toolbar instead of first visiting Wikipedia.

Edit: Ok, I understand what you mean. I'll try to make it a page action and post an update here.

I'm not sure if I'm willing to commit to a button that only serves as a bookmark. Other extensions handle this by using the options page for such a page. Button spam is a serious problem on Chrome, everyone wants to be a browser action when few actually offer meaningful features for such buttons. Xmarks is a great example of this. It's just a menu.

On another note you might want to submit this to /r/chrome subreddit on reddit.

Try it out now: http://wikitrail.zetabee.com - it is a page action that shows up on wikipedia.org and tvtropes.org.