v64.1.4+FF57.0 - addon does not retrieve local net site preview. for example http://192.168.1.1/free-sa/
Could you show me how does it work for you?
Firefox doesn't allow it anymore. You need to your own image.
I have had a blue smiley instead of preview. when I click on that blue smiley opens the site. last time I was inattentive and gave you the wrong version, the right version is 58b4 and after update to the FF58.0b5 problem has gone. I specially have made some tests on the addon on the FF57.0 (release) - works fine.
Glad that it works fine for you!
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