Simple and nimble enough for my needs, especially the ability to number the list of feeds!

GREAT add-on!!! Thank you very much!!!!!!

думал импорт из OPML - это с расширением OPML, а не XML.

This add-on works great for me. I get a heading and all data in the font size I specify. I can change the default five entries received to , in my case, 15. Mpage updates the RSS feeds much faster than any app I've used. I imported an OPML file and finally worked out that I had to hit the HOME button resulting in all my OPML RSS feeds appearing with all the news.

good too go?

Well, it happened. Mozilla deleted the internal XML/ Atom/ RSS reader code. Much has been said about it; it was old, only 0.1% of users were using it, and according to Mozilla itdidn't fit with work flows. Whether this all is valid/ true remains a mystery, as is Mozillas insight and knowledge of users workflow. Naturally, alternative thoughts could also be that Mozilla rather have users use its Pocket, Cliqz, Reader, and other "trackable" options. Because user data pays the bills, pesky knowledgeable users switch off telemetry, and, after all, Google and Apple also canceled it. (Hmmm, I wonder why?) Anyway, IF you're looking for a RSS experience/ solution, give this add on a try. mPage won't probably fit all your needs, or do everything you want it to. I for example loved the quick, clutter free way the old code allowed me to scan important news by going through headlines and 1st lines of flat content QUICKLY. I only looked at the RSS feed I wanted/ needed and didn't need ALL my feeds to update continuously. mPage doesn't allow me to do that work flow (sadly). It only shows article titles and no 1st body text lines. PITA, if like me, you need to scan for example FDA warnings, and news item titles are just a generic "WARNING". Also mPage does insist on loading all or nothing (I think ☺). But still, mPage does enable you to shape your own work flow, do stuff quickly, efficiently, without hassle, distraction, or excessive system loads. THX Matija for giving users this solution for Mozillas policy decision...

Poorly done, all you get is a list of titles, no way to preview what's inside every post in your feeds. I was looking for a replacement for "Sage", so I found a great one: "Feedbro".

mPage on mobile Firefox is a very fine alternative to the desktop Firefox's news readers like Feedbro. Runs nicely even on Nightly.

Two thumbs up -and five stars to the addon author.