What's new in HTML 5 "stand-alone web application" that was not yet available in all browsers?

What's new in HTML 5s "stand-alone web applications" that was not yet available in all browsers?

Offline caching is the job of the browser - how did this become the job of HTML?

Web cache is a mechanism for temporarily storing (caching) network documents, such as HTML pages and images, to reduce bandwidth usage, server load, and perceived lag. The network cache stores copies of documents passing through it; subsequent requests can be satisfied by the cache if certain conditions are met.

As written in the Wikipedias article for web cache .

And this is written for the standalone web cache on the W3C website:

So that users can continue to interact with web applications and documents, even if their network connection is unavailable - for example, because they travel outside the ISP service area - authors can provide a manifest that lists the files that are necessary for the web application to work offline mode and which causes the user's browser to save a copy of the files for offline use.

What makes HTML 5 better and better in caching?

Does it look like offline in Internet Explorer 5 ? And can we cache data beyond the amount of space set in the browser?

Please give me an example to understand the difference between the standalone HTML 5 cache and browser caches.

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