I updated the Extension (to version 1.26), to support the new dialog. You should now be able to use the extension to Invite all friends to like your Facebook page. I also included some performance improvements. smile emoticon
I'd be happy to get feedback, if it works for you!
Side note: When you click the select all button with the new "invite button"-style dialog, the invites should be sent right away. No way back! wink emoticon
... If 1.26 is not visible in the Web Store, you might have to wait a bit. It's being published right now...
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