I'm not aware of any.. but lack of future for Firefox and discrimination by Google on his sites. Mind that Mozilla Foundation main source of income is Google,

I'm not aware of any.. but lack of future for Firefox and discrimination by Google on his sites. Mind that Mozilla Foundation main source of income is Google, Mozilla is not much interested in spending that money on Firefox development and Firefox loose his great competitive advantage of powerful addons making everything possible, since allowing WebExtensions only (same as Google uses) at version 57.