Microsummaries
Not yet visible on most sites but available within the Firefox 2 code is something called Microsummaries. This allows a page to push out the most important details of that page for display within your browser, such as "weather pages: the current forecast, for example, SF: showers likely." This differs from Really Simple Syndication (RSS) in that there isn't much additional content available, but the content will be updated as often as necessary.
RSS reader
Mozilla also wants to streamline the Really Simple Syndication (RSS) subscription process--currently, you must add RSS feeds as live bookmarks in Firefox 1.5. In Firefox 2, click a page's RSS icon, and a default RSS reader within Firefox displays the latest headlines from that site (no more ugly XML code).
Inline spell-checking
Now any text that you type into multiline text boxes online will be checked for mistakes. However, only dictionary words are checked, and misspellings are identified with a squiggly red line. Grammar, which includes missing words, will not be checked.
Add-on management
In Firefox 2, you can manage your extensions and themes (skins) within Firefox in one console.
