Roleback to DownloadHelper v4.5 because of Songbird-compatibility

Works with Songbird 1.4.1

From version 4.6.4 to 4.6.5
 Songbird
<em:minversion>1.4.1</em:minversion>
<em:maxversion>1.6.0a</em:maxversion>
DownloadHelper
    * Fixed bug #71: Handle new YouTube high-quality format HQ37 (1920x1080). Note that to be recognized, this format must be enabled in the DownloadHelper preferences, section Capture, tab YouTube.
    * Fixed bug #47: Some YouTube pages loosing possible capture because of late frame load in YouTube ads.
    * Fixed bug #55: Network capture fails if file name contains a colon.
    * Fixed bug #58: Download failure when YouTube video has a colon in the title.
    * Fixed bug #49: Gallery download deletes an existing folder.
    * Fixed bug #50: Downloadhelper fails to pick up video download title when download is from Channel page.
    * Fixed bug #41: Striking color for adult sites list. Adult sites names are now shown in red.
    * Made compatible with Seamonkey 2.0.
    * Added Sinhala (Sri Lanka) locale
    * Updated other locales.

From version 4.6.3 to 4.6.4

    * Passwords for Twitter and MP3Tunes features are now stored in the login manager and not in the preferences anymore.
    * On browsers based on mozilla branch prior to 1.9 (Firefox 3.0), Twitter and MP3Tunes services are not displayed (they were unusable anyway).
    * Removed a couple of eval's in the code to prevent automatic check tools to generate warnings.

From version 4.6.2 to 4.6.3

    * Added the capability to perform a Quick Download operation of the currently viewed media when clicking on the icon (either in the toolbar or the statusbar). The default is still to display the supported sites list and can be changed from the preferences.
    * Passwords for Twitter and MP3Tunes features are now stored in the login manager and not in the preferences anymore.
    * Added alert message when failing to create the output file.
    * Added .mp4 in the list of possible extensions when defining a conversion rule.
    * Added Arabic locale.
    * Fixed bug #28: Media capture method could lockup Firefox for a while if the page contains too many links. The number of links to be handled is now 50 by default and can be changed from the preferences.
    * Fixed bug #16: Smart naming not working in the history.
    * Fixed bug #33: Smart naming not working for gallery capture.
    * Fixed bug #8: Supported sites dialog opens collapsed after Customize toolbars has been used.
    * Fixed bug #26: Download a YouTube video containing the character " caused the download to fail on Windows. Also fixed similar issue with character |.

From version 4.6.1 to 4.6.2

    * Updated YouTube capture method to cope with August 17th change at YouTube.

From version 4.6 to 4.6.1

    * Updated the YouTube capture method that was no longer working due to a change in YouTube pages.
    * Fixed bug introduced with the SmartNaming feature where YouTube high-quality format (like [HQ18]) was no longer displayed in the menus.
    * Fixed bug with SmartNaming causing the context menu entry SmartNaming still appearing while the feature was disabled.
    * Added Danish and Slovenian locales.
    * Updated other locales.

From version 4.5 to 4.6

    * Added the capability to tweet a video over Twitter. If you don't know yet about Twitter, it is a micro-blogging service that has become outstandingly popular for the past few months. Learn more here.
    * Added default Smart Naming database (importing the latest database from preferences, section Capture, tab Smart Naming is still a good idea)
    * Fixed compatibility of the Smart Naming feature with some menu redrawing extensions like CuteMenus.
    * Fixed Smart Naming feature for file names when the video title is too long.
    * Fixed minor issues

From version 4.4.1 to 4.5

    * Here is an improvement that has been requested by many users for a long time: getting a meaningful default file name instead of just a serie of digits that you get from most sites. Details about the Smart Naming feature are there.
    * Filtered out some special characters in file names when using the Capture from YouTube link(s) method.
    * Updated locales.

From version 4.4 to 4.4.1

    * Fixed broken gallery capture.
    * Fixed YouTube widget menu: the menu attached to the widget was misplaced, due to a bug in Gecko (Firefox layout engine), revealed by a change in YouTube page structure. This was causing the Quick Download service to be started immediately instead of giving the menu choice.
    * Fixed exception in converter path setting (this could occur on non-Windows platforms only).
    * Updated locales.

From version 4.3 to 4.4

    * Extended download menu: when you move the mouse over the videos in the download menu, you can see a sub-menu giving direct access to all possible actions you can take on this media (Download, Download & Convert, Copy url to clipboard, ...). Note that you can still click the main entry as it was before, with your configured quick keys. If you prefer the old way menu, you can easily switch back from the extension preferences, section General, tab Behavior, parameter Extended download menu.
    * The History feature now also tracks MP4 files, not only FLV.
    * Added Czech locale.

From version 4.2 to 4.3

    * Ever been annoyed getting video ads triggering DownloadHelper notification ? The new black list feature allows to filter out some media hosting sites. Check the preferences, section Capture, tab Black list, or hold CTRL when clicking on the video to launch the Add to black list service.
    * Added video search from within the extension system menu (right-click on the DownloadHelper icon).
    * Many minor fixes and improvements in the user interface.

From version 4.1 to 4.2

    * All known YouTube high quality formats are now handled. See the YouTube preferences help page for details on the configuration.
    * MP3Tunes services, such as sending a video directly to your mobile phone, are fully integrated with the capability to upload the audio track and/or the full video. See this page for details and demo videos.
    * Added mobile phone 3GP pre-defined conversion format. Click here to add this format to your list of configurations. For details about embedded video conversion, visit this page.
    * Fixed 'Media' sub-menu disappearing suddenly in the Tools and context menus.
    * Added Russian locale.
    * Several minor fixes.