Default OS update log

[Jeffersoniantoo]

In your Home folder, goto the .mozilla folder, then "firefox", then the folder that ends in "release".  There is a javascript preferences file that contains the config for firefox.  It is called "prefs.js".  Open this and find the same tag, change is back to "false", save it and try to open firefox again

Good luck!

Thank you, Jeffersoniantoo.

I found and made the switch, but Firefox still doesn't work. I guess the problem was somewhere else, maybe with the change of user name and home? I did just before the change in Firefox.

I imagine that uninstalling firefox and all its config files and reinstalling it might work.

How can I do that? There are 2 doubts:
1. How can I uninstall it with all the settings?
2. How to install it? because it was installed with the update 1.5 and not the repos of debian

Thank you!

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Hmmm...

You can use synaptic package manager or "apt-get remove firefox" to completely remove the firefox package.  I would also go into the .mozilla folder and delete the firefox folder if it still exists.  Then use synaptic to reinstall or install from command line (apt-get).