User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:184.108.40.206) Gecko/20071008 Firefox/220.127.116.11 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:18.104.22.168) Gecko/20071008 Firefox/22.214.171.124 hi the new firefox (Firefox/126.96.36.199) instance gets totally non-functional if you have opened a file dialog box in previous instance. but if you close the dialog box then the new instance starts functioning. just like you trying to make a mail attachment in one instance and keep the dialog box in open state and suddenly open a new firefox instance to do some otherthing. so what we found is the new instance gets totally inactive, neighter are search engines displaying nor the address bar is functional. Reproducible: Always Steps to Reproduce: 1.open a mail site, compose a mail and make an attachment and keep the dialog box in open state. 2.now open a new firfox instance and you will see it won't work. 3.
This is bug 257121.