There are forums to find answers for problems with the add-on, I found the how to add locations fix here: http://forums.mozillazine.org/viewtopic.php?t=2913287 I just went to the last page. I've used forcastfox off and on for years and I <3 it.

This weather extension id great. You can track multiple cities, use multiple measurements , accurate and works every time. Very easy to use.

Thanks to this add-on, I was able to efficiently prevent my water pipes from freezing.

круто!

Thanks for the weather

IF YOU CAN'T CHANGE LOCATION IN FORECASTFOX, JUST DISABLE THE HTTPS EVERYWHERE. This is the only problem I met.

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-> Forecastfox (fix version)

w FF 88.0 - Super !! Bravo !! Très complet
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Nice layout with good features, recommend.

Stopped working (connection issue) late last night. Was working fine till then.
Update - Working fine now again. Thanks for the fix

The new version wiped out the settings I had for 10 additional US cities I keep track of. The new version does not allow me to reenter those cities. I now have only the default New York setting. Before the update, the addon was working fine with the 10 cities I commonly watch for weather. This is a minor setback--how do I get this working again. Other than this new issue, I highly recommend this addon for use with Ffox.

[Update] Disabled my other addons--no change. Still cannot readd cities I had before, just sits there spinning (cursor). Maybe it's stopped working with current Firefox--don't know. Perhaps the author can give us some feedback. Has usually been responsive in the past. This has been a good addon until now. My version of Firefox is v85.0 x64. I also checked Google Chrome where I have this also installed. While working before, it now reports bad connection with weather svc. However, it seems far more functional than the FFox version.

[update 2-09] have tried several older versions starting with 4.25. None work--cannot input other cities, as previously mentioned--cursor just spins never connecting? or allowing city input. Addon has become non-functional. Where's the author with a temp fix?? I rechecked my G.Chrome version v4.26...seems ok! Now what about the Firefox version??
Too bad. Firefox addon is non-functional!!

[update 2-10] disabled Firefox setting HTTPS--everything now works!!
case closed...