[WalterGR]

I was just about to update my installation, but it told me that my Roboform extension isn't compatible with v7.

How do you get to that information prior to the upgrade?

I've only realized extensions were incompatible after updating, because Firefox disables them.

[mbrubeck]

Did you receive the update automatically, or did you download and install it manually? If you are using automatic updates, Firefox should ask before updating if any of your add-ons will be disabled.

[WalterGR]

My experience is that if I click "Check for updates" and an update happens to be available, then there's no way to prevent that update from being installed, even if it causes add-ons to be disabled.