Out of curiosity, if there was a Firefox App Store, how much would you pay for Tree Style Tabs?
Look at the sorry state that is Tree Style Tabs clone in chrome - which is because Chrome's extension api is just not powerful enough.
Old-school extensions can change entire parts of the browser, remove features, there really is no limit because the extension code is dumped inside the browser code without any kind of interface or security limitation. So it's powerful, but potentially destructive as a bug in an extension can impact the whole browser, and same goes for performances.
On the other hand, the new API is more like Chrome where you have defined entry points to plug your extension.
The new API approach has limitations, but it's a much better way to do extensions. Not only it limits the damage a poorly written extension can do, but it will make extensions more robust to version upgrades of Firefox.
Probably a few bucks. TST is pretty fundamental to my Firefox workflow.
The same could be said of most free software. But see [1].
> Out of curiosity, if there was a Firefox App Store, how much would you pay for Tree Style Tabs?
I don't know. I keep dozens of tabs of reference materials open at work, which becomes unmanageable without it. I'd either pay for it, find a new way to work, or build my own.
That's one way to make a living from software in the long term, but it sure does seem wasteful. And if the technology truly hits an asymptote, then it's not clear what will drive the decay apart from programmer self-interest.