Steps to reproduce. 1/ Open two different pages in two tabs (for example https://bugzilla.mozilla.org/show_bug.cgi?id=580658 in one and https://bugzilla.mozilla.org/show_bug.cgi?id=580660 in the other). 2/ Open find bar. 3/ Search for some text which you know appears on both pages on first page. 4/ Switch to other tab and click on next button on find bar Expect result 1/ Window scrolls to found text Actual result 1/ Window does not scroll but clicking on next shows it is going through where text is found as does come up with "Reached end of page, continued from top" message.