They originally started with Gecko and switched to Chromium.
"There were a ton of issues using Gecko, starting with (at the time) no CDM (HTML5 DRM module) so no HD video content from the major studios, Netflix, Amazon, etc. -- Firefox had an Adobe deal but it was not transferable or transferred to any other browser that used Gecko -- and running the gamut of paper-cuts to major web incompatibilities especially on mobile, vs. WebKit-lineage engines such as Chromium/Blink."
It is untrustworthy as it will keep turning on features. Example - sync. If you aren't using sync, it will eventually turn it on. If you aren't syncing history it will turn that on at some point.
The most important part of profiles is being able to right-click on a link and open it in a different profile. I don't see that mentioned. I typically have multiple profiles open at once.
Edge has the best implementation where you can define sites opening in certain profiles. Pity ms ruined that browser - it is completely untrustworthy with it auto turning on options such as syncing.
Mozilla will lose 86 percent of its funding if the Google deal goes away. Unless they can somehow generate an equal amount there will be massive layoffs and Firefox will be in a death knell. So far they have not managed to wean themselves off the Google money.
I have used that, it's pretty nice! For now I settled on TickTick cause it's easy to use from my Linux laptop and my iOS devices. If you are fully Apple, Due is a good choice.
"There were a ton of issues using Gecko, starting with (at the time) no CDM (HTML5 DRM module) so no HD video content from the major studios, Netflix, Amazon, etc. -- Firefox had an Adobe deal but it was not transferable or transferred to any other browser that used Gecko -- and running the gamut of paper-cuts to major web incompatibilities especially on mobile, vs. WebKit-lineage engines such as Chromium/Blink."
https://news.ycombinator.com/item?id=28941623
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