Edit: The kind of feedback they're willing to accept is probably only barely impactful. Suggest going back to the old tab bar? Sorry, but you'll learn to love it and we aren't changing it. Suggest a slightly different shade of gray for the edge of the rounded tab bar? They might just take the suggestion. That kind of thing.
https://mozilla.crowdicity.com
They seem to be reading and considering some of the suggestions, though none have been implemented yet.
- Most popular idea (819 votes): Compact Interface Option - https://mozilla.crowdicity.com/post/719764
- Most critical idea (in my opinion): Expand support for extensions for the stable android version - https://mozilla.crowdicity.com/post/723675
If that's true, it probably explains why they're bleeding users. Why stick with a company that ignores your complaints?