Dust-Me Selectors is a development tool for Opera and Firefox, that scans HTML pages to find unused CSS selectors.
The long-awaited updated to this popular Firefox add-on has just been released, after almost a year in development, while the new Opera extension was released a few weeks ago, to exclusively-positive reviews.
The Firefox version has a huge number of bug-fixes and improvements, most notably a fix for the spider's tendency to hang while scanning some sites, and a ten-fold increase in scanning speed -- so on average, it can now scan five pages per second, where before it would take up to two seconds per page.
The Opera version is forked from the same core codebase, for parsing stylesheets and scanning pages, but its interface had to be completely re-designed to suit the capabilities of Opera's API. It's just as fast and just as solid as the new Firefox version, and brings this useful tool to all who have Opera as their browser of choice.