Henrik Gemal’s Using Mozilla in testing and debugging web sites makes me realize just how much I take for granted in Mozilla. Sure, I give a silent thanks whenever I use the JavaScript console, Venkman, or the DOM inspector, but until now I hadn’t really given any thought to how nice it is to have detailed control over my cookies, colored HTML source, and detailed page information.

Cool things that I didn’t know about:

  • LiveHTTPHeaders, a tool for live access to HTTP headers on pages you visit. A far sight handier than, say, a telnet session or Rex Swain’s HTTP Viewer, although those certainly have their uses.
  • View Selection Source (described in the article).
  • Cache manager. Enter about:cache in the location bar.
  • Configure Mozilla with about:config.

Granted, I no longer use Mozilla for casual browsing at home (I switch between Safari and Chimera), but I do use it as an ever-more-indispensible development tool.