(I assume you meant "a few"). Which ones, by curiosity?
The biggest blocker for me is font kerning on canvas elements being broken. That causes Google Docs to render terribly which makes it practically unusable. https://bugzilla.mozilla.org/show_bug.cgi?id=1445596
Another one is favicons not being stored/synced across browsers. This causes me to have a bookmark toolbar with entirely the same default icon without any text. (I prefer them as icons, fits more stuff there). I don't have this problem with Chromium based browsers. https://bugzilla.mozilla.org/show_bug.cgi?id=428378
As was stated in the article[1], close to half a million dollars was spent on a social-justice related organization, the Mackenzie Mack Group.
“[Mckensie Mack Group] is a change management firm redefining innovation in the white-dominant change management industry.”
In the article it also says " While The Lunduke Journal does not like to delve too deeply into the Political Woods (tm), it should be questioned why so much money — possibly millions of dollars donated by individuals who thought they were supporting a web browser — is being funneled into highly political organizations that seem to have no involvement with the World Wide Web, Web Browsers, or any related standards. "
1. https://lunduke.locals.com/post/4387539/firefox-money-invest... "
It does have a lot of administrative overhead that it could do without, instead of laying off engineers, like they did. But the article itself is trash, due to complaining of $892,000 worth of expenses that seem dubious, in an organization that makes 500 million per year, which paints a certain kind of picture that's disingenuous.
If they spend most of that $200 million on Firefox annually and we have abhorrent text rendering on canvas elements for YEARS, something's seriously broken there.
And note that they also develop the operating systems (Android, ChromeOS, iOS, macOS), so have an integration advantage from it.
They spend enough? Mozilla obviously doesn't.