Hello, I search a web drive hosting allowing to execute firefox portable (like a usb key) on live (without downloading it to the hard disk).
New: Kanri (Oct 9, '24), Platform 29.5.3 (Jun 27, '24)
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For two reasons
First of all, in order to be able to run an application from it, the web drive would have to be mounted to the local PC, as either a drive letter or mapped onto a folder. It is generally not good enough for it to appear as a device in the "Other" section on explorer. This means that all of the web services that I know of that could do that would need to install a driver on the PC, which fails to meet your "no install" choice.
The only way I can think of around that, with no driver needed, would be for the web service to be made available as a windows network share that you can map, which would be, to put it mildly, incredibly insecure. I do not know of any service that offers such connections.
The second reason is speed.
My Flash drive has a read speed of 24Mbps, and a write speed of 16Mbps, and firefox running off it is slow, but useable.
Domestic broadband will typically give you a read (download) speed of 4-6MBps, and a write speed (upload) of around 0.5Mbps. In other words, 6 and 30 times slower. I seriously doubt that the performance would be acceptable, even if things didn't time out completely.
This is why services like DropBox any suchlike make a complete local copy of the storage space that you interact with, and upload/download any changes asynchronously in the background. But that needs an install of the sync app and a full copy of the app and your data on the local PC.
I can completely see your point in why you would desire such functionality, but, sadly, I don't believe that the technology is even close to there to provide it.
The only thing that I've ever heard of that comes close are some services that offer a browser-based "virtual desktop" environment, where you run the app on a remote server, and just the display from it is show in the browser on the local PC, but all of those services suffered from pretty poor performance and refresh issues, last time I heard.