Question

Updated Firefox won't save my preferences; reverts to original settings.

A few days ago, Firefox updated itself to the 18.0.1 version. Now, each time Firefox updates itself, I tend to lose some of my preferences, those being: opening new tabs as a blank page, tabs being on the bottom, and showing my windows and tabs from last time. Usually, though, once I go and change these things back to the way I like them, they stay like that and I have no further problems.

However, this time Firefox won't save my preferences. The tabs go back to being on top, the tabs I last closed aren't there, and these tool bars I don't want keep appearing. Instead, three tabs are always there upon opening Firefox: Welcome to Firefox, Mozilla Firefox Start Page, and Yahoo! Toolbar. Also, when opening a new tab, the page says, "page does not exist" or something, and the URL is not even comprehensible, just random letters like someone bashed their head into the keyboard, something like: "jkfui87$^&%$$09."

I've tried resetting Firefox like it says in the "How to fix preferences that won't save" page, but it didn't help. As for deleting certain files from the profile folder, before I resetted Firefox, I only had "user" and "prefs" and "Invalidprefs" which weren't exactly what that self-helping page asked for so I didn't delete them. After I resetted Firefox I lost the "user" file, but I still have the other two. Should I try deleting them even if they're not exactly like the page describes? They are missing the ".js" part so I haven't felt comfortable messing with them.

Please give me some advice. I'm tired of having to go change my settings in "about:config" each time I open Firefox. But I really don't want to try anything that would delete my bookmarks or history, as I'm very dependent of them.

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