This bug should be linked ageist https://bugzilla.mozilla.org/show_bug.cgi?id=462970 instead, the description in that bug match better as its the bug for clicking on the border of the element.
** Bug watch added: Mozilla Bugzilla #462970 https://bugzilla.mozilla.org/show_bug.cgi?id=462970 -- Strange behavior when pasting a text in a text box with mouse cursor on the edge of the text box and left mouse button pressed https://bugs.launchpad.net/bugs/508969 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