This document describes how Chrome will enable users to subscribe to RSS/Atom feeds in the feed reader of their choice. It does not cover any feed reading capability in Chrome itself.
When a feed is available for a page, we will display an rss icon in the address bar:
Clicking on the feed icon will redirect the user to feed, nicely formatted for the browser. If the page specifies multiple feed formats, the icon will link to the first feed specified. The default formatting for feeds may allow the user to access other options (see Preview below).
We should also consider whether we want to detect feed links in the content of the page (for pages without auto-discovery). However, given the popularity of auto-discovery mechanisms, this probably won't be necessary.
When the user follows a link to a feed file, Chrome formats it for display in the browser:
If the feed is malformed, we would display an error instead of the feed contents (rather than including a lot of unnecessary feed parsing code). Users could still see the title and suscribe to the feed.
Caveat: parsing feeds can be tricky, so in the interest of shipping this quickly, the initial implementation will likely not include a preview of the content.
If the feed specifies custom formatting (such as Feedburner's BrowserFriendly), we could use that formatting instead. In that case, we would still display the feed icon in the address bar, which would redirect to the Chrome-formatted version of the feed.
If the user access the feed preview page from the rss icon in the address bar, and the referring page had multiple autolinked feeds, these could also be chosen from the preview page.
By default, we will include a limited number of popular feed readers (list TBD). Ideally, we should also detect popular feed-readers installed locally. If settings have been imported from Firefox, we should use that list instead (including remembering the default setting). Finally, users can also add the feed reader of their choice (see Adding feed readers below).
Users can set a preference to bypass the preview page. From then on feeds will be redirected to the subscription page for the feed reader of their choice.
[mock that allows to add a web-based or local feed reader]
We will also need a way to change your feed reader from the settings dialog, in case you have chosen to bypass the feed preview page.
A newly added feed reader becomes the default selected option the next time a feed is previewed.
When this function is called, the following dialog is displayed:
[mock of permissions to install a feed reader]
[mock of how we handle podcasts in add/manage feeds]
Ideally, the formatting for Media RSS feeds should display embedded readers for the attached media files.