Firefox used to show our browsing history from years ago. Tonight we tried to access our history and all of a sudden it goes no further back than this month. How did this happen, and how can we get the older history back? We have been researching this for several hours tonight and have already tried many of the suggestions such as viewing the places.sqlite file--which we did, but which also only showed history going to the beginning of June--trying to view the index.dat file--which came up empty using the index.dat analyzer reader--and trying to read a JSON file that is called "session store backups." OS Windows 10 We know our way around a computer, more or less, but are not programmers or coders.