How can I use something like HTML5 localStorage, but shared between browsers?

Question

I tried localStorage in HTML for my project. When I save some data using localStorage in one browser and try to read it in another browser, it fails.

1. How can I save data that is common across all browsers, like Flex is doing?

2. And where these data are stored in Windows 7?

Answer 1

1. This is not possible.

2. Every browser stores it in its own location (this is the reason it is not possible). The localStorage is not an OS service, it is part of HTML5 specification, which is implemented by each browser separately.