Wiped out Firefox my homepage update which was a custom configuration for a site that I can't come back. Why what happened?

A Firefox update yesterday, November 22, 2016, wiped out my home page setting. The home page was a complex URL with some custom settings for a site. Why this get wiped out in the update and where can I find this setting to restore? This is unacceptable behavior for an update!

Your Firefox perform a refresh during the update? If so, you should find your old profile folder (settings) on your desktop in a folder called old data from Firefox.

If you find that the file prefs.js will have your old home page setting.

Don't double-click a .js file, because Windows will be executed as a system script. Instead, right click > edit the file to open it in Notepad or right click > open with choose a different text editor. Then find the line starting with:

user_pref ("browser.startup.homepage"

and who should have the setting you need (do not include the beginning and end "when you copy / paste to the Options of Firefox page").

Tags: Firefox

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