User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8a) Gecko/20040506 Firefox/0.8.0+ Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8a) Gecko/20040506 Firefox/0.8.0+ The "Modern" theme is listed as an option, but can't actually be chosen (nothing happens when you choose it, and then if you look again in the preferences -> theme section, you'll see that your theme selection has reverted). Quitting and relaunching Firefox does not help. Reproducible: Always Steps to Reproduce: 1. Try to choose the Modern theme. Actual Results: nothing changes Expected Results: appearance should change to Modern theme

*** This bug has been marked as a duplicate of 191992 ***