User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 (Beta/Release) Build ID: 20140715214327 Steps to reproduce: [Make a cell with class name "social-header"] I didn't get the bug myself but I'd like to contribute and the developer is too lazy to file a bug report 23:41 @ ^^^ also i just fixed the weirdest bug in the entire universe 23:42 @ ^^^ so this one table header cell had a negative width in only firefox 31 for some weiird reason 23:42 @ ^^^ not in firefox 30, not in any other browser 23:42 @ ^^^ apparently it was because it had the class name "social-header" 23:42 @ ^^^ as soon as i changed the class name to "social-header2" it was fixed 23:42 @ ^^^ like i switched back and forth several times 23:43 @ ^^^ and like that was exactly the problem 23:43 @ ^^^ idk like "social-header" is a magic word in ff 31 or something Actual results: [cell with class "social-header" had negative width which is fixed when the class name is changed] Expected results: [cell with class "social-header" should not get additional attributes]
http://jsbin.com/yucud/1/edit Doesn't show any issues for me in Firefox 31, nor does http://mxr.mozilla.org/mozilla-release/search?string=social-header turn up any hits... Can the other developer (lazy or not...) perhaps provide a testcase? :-)
It might be an add-on that injected a stylesheet into the page. Given that there are no mxr hits for "social-header" I'm pretty sure this isn't a bug in Firefox proper. Feel free to reopen the bug if you have a testcase that demonstrates the problem.