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Where did EVERYTHING go? Update to 48 killed FireFox's stored data

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Hey guys, it's not in the least funny to have FireFox lose EVERYTHING, addons, plugins, data. Only bookmarks and history remain. I am far less than amused.

edit: removed unnecessary/violent parts of your question. (philipp)

Hey guys, it's not in the least funny to have FireFox lose EVERYTHING, addons, plugins, data. Only bookmarks and history remain. I am far less than amused. <sub>edit: removed unnecessary/violent parts of your question. (philipp)</sub>

Modified by philipp

Chosen solution

do you happen to have a folder labelled "old firefox data" on your desktop?

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Chosen Solution

do you happen to have a folder labelled "old firefox data" on your desktop?

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Note Firefox 48.0 is Not a Release as it is currently on the Beta channel at build 48.0b1 currently.