User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:184.108.40.206) Gecko/2009011913 Firefox/3.0.6 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:220.127.116.11) Gecko/2009011913 Firefox/3.0.6 when you open firefox with tabs behind a proxy that requires authentification, each tab will require you to validate your login and password several times. As each time that I click on the ok button, I only see one new image loaded, I think that each time Firefox needs to load a new file, it will not check if you already authentified yourslef to the proxy. For me this is quite annoying, since each time I open Firefox with 10 tabs, I have to click 20 to 100 of times on the ok button. Sometimes, that even makes firefox crash ! Reproducible: Always Steps to Reproduce: 1. Set a proxy and configure FF to use it 2. open Firefox and create tabs 3. Close Firefox 4. open Firefox again Actual Results: Now, you have to click many times to load all tabs... Expected Results: Just give my password and login once for all tabs.