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* Updated look and feel of feed item preview page.
* New shortcut to open the sidebar: Ctrl+Shift+Y, since the last two shortcuts were later taken over by Firefox.
* Updated icons to support hi-DPI (Retina) screens.
* Now using inline settings on the addon detail page.
* Fixed unread state in Firefox 22.
* No longer auto-adding the RSS button, since it's too similar to the sidebar button when they're placed side by side.
* Removed code unused since Firefox 3.
* Replaced deprecated synchronous livemark API calls with new async calls
* Fixed whitespace in history menu dropdown
* Fixed warning about no charset for preview iframe
* Fixing bug preventing featured feeds from being updated after the first time.
* Removed "Trending News" subscription option
* Added SmartLinks feature
* Added SmartLinks feature
* Fixed character encoding of certain non-ASCII feeds.
* Fixed a bug that caused the sidebar to not automatically update feeds on browser startup for a small percentage of users
* "Featured Feeds" feature
* Various localization fixes.
I removed version 4.3 due to the debug statements overwhelming some users, so this version also includes these upgrades from version 4.2.1:
* Added Ctrl+Shift+E shortcut for Firefox 3.6 users, since Ctrl+Shift+F is now for fullscreen
* Now showing unread counts in collapsed folder titles
* Fixed bug that caused the "Show X days" setting to revert
* Fixed bug with unfinalized storage statements (memory leak and JS errors)
* Fixed bug that wouldn't reset search filter when clicking on the X in the search box.
* Fixed bug preventing automatic loading of a new feed when the update interval is turned off
* Fixed bug causing boxes in feed titles instead of special characters
* Fixed keyboard navigation of feed items
* Switched to platform-specific folder icons
* Fixed bug that would mark feed items as read when the feed folder was closed.
* Cleaner feed item preview page.
* Fixed bug that prevented items with the same URL but different GUID from appearing in the sidebar
* Made OneRiot subscription dialog non-modal
* Offering social trends feed on first run.
* Updated translations.
* Changed feed updater to work slowly, but all the time, rather than quickly and all at once.
* Small improvements in memory management
* Firefox 3.1a1 compatibility
* Added "Always open in new tab" option
* Fixed bug related to viewing a feed's homepage
* Removed 'Mark All as Read' from context menu
* Added "Show all" button to search bar to show unread and read items.
* pl-PL, de-DE, zh-CN, zh-TW translations
1. Look and feel. I updated all of the icons for the extension to blend in with Firefox 3's new OS-specific look and feel. The sidebar's toolbar uses the native theme icons, and the toolbar button is specifically designed to fit in on each of Mac OSX, Linux, and Windows.
2. Continuous updating. Feed Sidebar used to only check for feed updates when the sidebar was open; now it checks whether the sidebar is open or not (and notifies you when it finds updates). Big improvements in memory usage and performance were necessary to make this possible.
3. Offline capabilities. The extension now caches all of your feeds, so if you go offline, you still have access to all of the data that was in the feeds, and you can read it while offline. When you go offline, Feed Sidebar goes into "Offline Mode", and automatically opens the stored summary from the feed when you click on an item rather than trying to open the webpage the item references. This features makes use of the new online/offline events in Firefox 3.
4. Places integration - When you add or delete a live bookmark in Firefox 3, Feed Sidebar will detect that via Firefox 3's nsINavBookmarksService interface. When you add a new feed, it will instantly appear in the sidebar, and the reverse is true for deleting a feed.
5. Caching - as soon as you start Firefox, Feed Sidebar will fill the sidebar with the feeds you were reading the last time Firefox shut down, even if you are now offline. This is made possible via the new JSON libraries that shipped with Firefox 3.
* Fixed bug wherein feeds with capital letters in their domain name were not appearing in the sidebar.