Did Firefox lose marketshare because of:
Google intentionally making their sites worse in Firefox?
The lack of multiprocess for so long?
No support for Google Earth until 2020?
Google shipping a polyfill that made YouTube.com 3x slower in Firefox and Safari for years?
The move to WebExtensions happening too late, resulting in burnout and lost interest from the extension community because they had already ported their extensions to e10s?
Slack going out of their way to use a non-standard SDP format thats only supported in Chrome, resulting in no other browsing supporting video calls?
Microsoft Teams also does the same thing.
Mobile overtaking desktop, where Chrome reigns supreme as a platform default?