Can't bear to part with your favorite browser extensions, but can't stand to see them devour your system memory? Maybe you should check out Firefox 15. According to Mozilla's Hacks blog, the browser's latest beta should patch up the majority of memory leaks gushing from Firefox add-ons. Also new, is the beta's support for Opus, a free audio format partially supported by Mozilla. The firm hopes competing browsers will pick up the format as well, calling it "as good or better than basically all existing lossy codecs." The blog makes quite a case for the format, citing tests and bitrate information, going as far as giving instructions on embedding Opus players in web pages. Check out the codec of tomorrow for yourself at the source links below.