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How can I change the choices in preferences in firefox?

GMLEE
GMLEE
more options

In Firefox preferences, I don't want to check the two check-boxes as below, especially later one.

'always check if firefox is your default browser' and 'Warn you when quitting the browser'

But the check-boxes are locked, so I couldn't change that choices. How can I uncheck the choices?

In Firefox preferences, I don't want to check the two check-boxes as below, especially later one. 'always check if firefox is your default browser' and 'Warn you when quitting the browser' But the check-boxes are locked, so I couldn't change that choices. How can I uncheck the choices?
Attached screenshots

All Replies (1)

Jeff Grossman
Jeff Grossman
more options

The first one is easy: check the top box, then uncheck the indented box, then uncheck the top box again.

For the other, well, I'm sure there's something under about:config that will do it, but you could also take the peasant route: set something else as your default browser then come back here and uncheck this box.