Problem with RSS subscribing maybe ???

[doppler]

When I try to subscribe, I get:
File not found

Firefox can’t find the file at chrome://brief/content/brief.xhtml?subscribe=https://mangadex.org/rss/manga_id/16279.

Check the file name for capitalization or other typing errors.
Check to see if the file was moved, renamed or deleted.

Using Brief addon in firefox. Not sure whats up.
I do have other subscribed feeds working. Not sure if the problem is local in FF or site related.

Any ideas where I can go, and TO HELL is a option at this point. Because summer is coming and humidity is not an option
in New York state. Hell would be more comfortable.

more FYI, Tried doing rss in google chrome. Happens. Firefox is more likely at fault.

 

[AviKav]

@doppler
You tried to use a Chrome URL in Firefox. Firefox is most definitely at fault.

 

[doppler]

I am really beginning to hate this whole RSS feed thing. It's such a hassle between work and home. Inconsistencies abound. Even with FF sync working for me. I will just play at home (RSS).

 

[AviKav]

@doppler
What steps led to that URL?

 

[doppler]

@avikav

Don't worry about it. I decided to do a reset to Firefox. Other suggestion on google. The problem went away. But as my previous message I will play at home for now. What got fixed? Don't care, it went away. As well as, a lot of specialty settings in my FF. Sync does not return all factors. After multiple FF updates, something got out of whack. I had the same problem with VLC too.