Why should I use Firefox, or any other browser, from a standard consumer prospective? Let me preface this by saying I am open to a new browser, especially one that is always in "incognito" and doesn't share sessions between tabs/windows. My favorite is Lynx but that doesn't always work . Facebook & Messenger for Android is pretty much spyware and they have over 1B downloads each, so that takes spying out of the discu…
It has near parity with Chrome's extension APIs now, so what works on one usually works on the other, but Firefox lets people dive deeper to build things like the above.
You can use uBlock Origin, Privacy Badger, NoScript and any of the others.
All for nearly Chrome performance, but probably less than half of the memory use of Chrome, and Firefox is getting faster.
As for the average user... That story won't fly.
It never has, and never will.
Chrome is not as damn good as it was when it first launched, and launched from the company that has nearly ubiquitous control over web searches.
Bigger issues to Firefox adoption from the public are things like, "This site only runs on Google Chrome. Download from here." Big name sites have been known to do this, like Netflix (on Linux, at least).
Or how Edge re-adds itself to the user's taskbar with nearly every Windows update.
Those things are what impacts day to day users, and that determines what they use to browse the web.
That being said, Chrome's more aggressive blocking of sites with poor SSL, and more aggressive blocking of Flash, might just push users to another browser... Which will probably be Edge. Because it's on their taskbar.
[0] https://addons.mozilla.org/en-US/firefox/addon/self-destruct...