@ LuftWafflePilot
Instagram does not like Pale Moon and discriminates against it. This is my impression. And I'll give you an example below.
I do not have an Instagram account and I have never had one. With that said, the designer (CJ Nelson) of my 9'3" Parallax single fin longboard does have an Instagram account.
He likes to post videos on Instagram. One video in particular, he is at a wave pool surfing a 9'3" Parallax just like mine. Since I don't have an Instagram account, I should not be able to see this video at the link below.
https://www.instagram.com/tv/B33lRRbCFk8/
But I do have a Jamboards account and I am always logged into the Jamboards site. As long as I am logged into Jamboards, if I click on the link above, even though I do not have an Instagram account, I can play the video as long as I am using either the Waterfox or Firefox browsers.
Even though I'm logged into the Jamboards site with Pale Moon, if I click on the link above, Instagram gives me a page which says the video is "no longer available or has moved".
In essence, Instagram isn't playing nicely with Pale Moon. At least it seems to me this is the case. If you want to see some of your friends content you like on Instagram, find out what other sites where you are logged into which should allow you to see the content for the some of the people on Instagram you follow.