Well, let's go over this once more:
Browser only shows "filler" tiles, that other companies pay to have there. Like an ad sticker on a wrapping paper on your brand new and free car. Firefox does not send any information to ad agencies, does not help them track you or do a full sweep of your activity (looks at chrome).
If you are so against predefined content, how come you were so totally OK all these years with Google search coming as default and Firefox getting a ton of money for it?
Now to adress the "bloated" part. Show me a slimmer browser, that uses less resources while retaining the same functionality? Browsers have become an OS in itself for running webapps. Don't like it - use mailer daemon to mail you the webpages you'd like to see. Richard seems to get along just fine doing that.
As for Pale moon - I am yet to see any usefull changes. They cut out features they don't like, claim they are faster and better, but except for dropping CPU's without SSE no useful optimisations have been introduced. The moment FF shuts down, Pale Moon is going down just as quickly without a main project to hold on to and to port all the changes from.
And last, but not least - when was the last time you donated to developers, that work hard just so that you and every other person on Earth has a reliable, auditable, privacy-caring, open-source browser? Donated code maybe, or at least filed a comprehensive bug report with logs and a case to reproduce?
Everyone's entitled to their own opinion and choice of browsers. But taking a dramatic stance and feeling all betrayed is way out of bounds. I draw the line at browsing experience and user tracking - as long as Firefox doesn't do anything that hurts end-user, they are fine to pursue other means of monetization, as long as the money goes to developing a better software.