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User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0 Build ID: 20170608105825 Steps to reproduce: Browse a news site with a lot of videos and ads. Actual results: Multiple copies of the same page would appear on the back button. (Back and FWD button history would show multiple copies of the same page, especially after clicking the back butoon a few times. Expected results: I have FOUND the solution in my case. I had TWO copies of Firefox on my computer. (32 bit) I don't know how that happened. But when I deleted both copies and reinstalled, the problem went away.
Component: Untriaged → Document Navigation
Product: Firefox → Core
I browsed bbc.com and randomly clicked video clips or articles, then pressed Back and FWD buttons several times. I couldn't reproduce this. Some steps missed?
Priority: -- → P3
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