Mozilla Connect

First time this ever happens, with Firefox or any other browser.Suddenly bookmarks disappear, buttons crash, right-click does not work, several website features crash...I am using Troubleshoot Mode.  

Guys,I love the browser, come from Netscape times. Use it on my Android phone and Debian laptop. Concerning Firefox for Android:Please, bring back the select all tabs option in order to share tabs. I have usually hundreds of them, that I like to book...