Dear Mrs @Laura_Chambers,
Mozilla Firefox is our beloved browser 
. Community members (Mozillians) like us have been using and promoting it for more than a decade and only want it to succeed in its mission to offer a privacy-respecting alternative in a Chromium-dominated browser landscape (for many years to come).
In this blog post (https://blog.mozilla.org/en/mozilla/a-new-chapter-for-mozilla-laura-chambers-expanded-role/), written right after your appointment as the new CEO of Mozilla Corporation, we could read the following:
2. Outstanding Execution: Focus, Processes, Capabilities: Doubling down on our core products, like Firefox, and building out our capabilities and innovation pipeline to bring new compelling products to market.
May I suggest to let the Firefox development team focus on Tab Grouping functionality and that you assign enough resources (UI designers, engineers and testers) to this crucial feature? Other browsers (Chrome, Edge, Vivaldi …) already offer this functionality. It is essential for modern day browsing in which people have tens or hundreds of tabs opened at the same time. On the Mozilla Connect portal, it is the no. 1 most requested feature: https://connect.mozilla.org/t5/ideas/native-tab-grouping-more-customizable-tab-bar/idi-p/303.
Please let Firefox grow by providing useful features like these, not (only) by inserting AI into the browser. Community will love this and will help boost Firefox’s adoption numbers.
Thank you for taking this into consideration.
PS. I invite others to spread this message through social media 
. Please refrain from impolite responses.