Do you give money to Firefox? As long as you are not paying money to a company, you should expect a little bit of "creep". Have you made any personal investments in producing privacy respecting software?

I don't know where you work, but I would go talk to your devops or SREs and ask them how important telemetry is to keeping things running and even more important than that, ask the business folks how important it is for informing business decisions.

I promise you that sometimes telemetry is really just telemetry.

This read is fairly satisfying to me: https://www.mozilla.org/en-US/privacy/faq/

The financial statement was also interesting: https://assets.mozilla.net/annualreport/2021/mozilla-fdn-202...

  Established in July 2003, Mozilla Foundation (the Foundation) is a California not-for-profit
  corporation that exists to improve and protect the internet as a public resource by working
  with thousands of volunteers to 1) keep the internet a universal open platform and 2) promote
  continued innovation on the internet. The Foundation supports the development of open-
  source, standards-compliant, free internet applications useable free of charge to hundreds of
  millions of users. It also a) develops foundational technologies that can be used to build the
  values of openness and interoperability into the internet; and b) fuels the movement for an
  open internet through educational work that connects open internet leaders with each other
  and mobilizes grassroot activities around the world. The Foundation is headquartered in San
  Francisco, California

  Advertising revenues - Mozilla also offers advertising services in three formats. The
  first is the New Tab / Tiles advertising service, which places links to sponsored
  content when a new tab is opened in the Firefox web browser. The second format is
  through Pocket’s email product, Pocket Hits. Pocket Hits may include paid
  advertisements, which are placed in email newsletters that get delivered to global
  Pocket users. Lastly, Mozilla also sells web advertisement spots on content that
  Mozilla licenses and syndicates from publisher partners across the web.

It is pretty easy to be jaded and cynical. There are many big tech companies that are definitely your enemy. Mozilla is pretty low on my list of concern and they are contributing way more than they are damaging.

Mozilla is also a non profit.

If you think your exposure to Firefox is a big privacy risk, think about google and your email, think about your phone backups or other backups, think about your non signal messengers, think about cloudflare, AWS, and GCP, think about your DNS provider, think about your photo album on your phone and how OCR is run on it to generate searchable tags and facial recognition is done to determine your social graph.

If nothing else, Firefox is supporting uBlock which is the single most important piece of privacy (and security) software today.