Well thats the thing... Firefox is not particularly good in anything and this is the point of the article. When Firefox becomes more unpopular than Mozilla fails its mission aside from Firefox, which is to set open web standards.

The situation for Firefox is that bad, that even enterprise users - ESR - are moving to MS Edge since its offering support together with MS Office.

I think Firefox needs something drastic to become relevant again, which is very unlikely taking into account the last years history.

Myself as a FF user i'm more and more tempted to switch to some other multiplatform-chrome-compatible browser.