I also experience this bug, and I found a way to reliably reproduce it. It works 100% for me. Just right click on some white space near the bottom right corner of the screen. Your firefox window needs to be maximized. When I do this, I always get the lowest menu item activated. BTW, it's on a desktop system, not on a laptop.
I think the following is happening: If your cursor it at a certain position, the right click will cause the menu to appear directly under the cursor. When you release the button, the menu item under the cursor is activated. This should not happen! BTW, it sounds like a gtk bug, not a firefox one. -- right click on a link does strange things https://bugs.launchpad.net/bugs/187313 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs