Contents • • • • • • • • • Overview This page describes a plan for improving software update for Firefox, Thunderbird and other applications. (I'll refer specifically to Firefox from now on.) See also. Module owners: module. Requirements • Support for silent or explicit downloading • Support for binary patching or full upgrade • Support for cryptographic signatures • Minimize impact on backend build and distribution processes • Allow users to easily view and control the process Schedule Security updates are a reality, so we need a better way to push out updates to people who desire them. With that in mind, the goal is to implement this system for Firefox 1.5. The Plan Revise the existing toolkit code which downloads XPI updates. Provide a silent mode that will be used for security updates.
Do this only if the user has agreed (via some UI during installation perhaps) and only if the user has write permission to the installation directory. We don't want this update system to get in the way of RPM or MSI based solutions, etc. Facebook Spy Tool Turbo Accelerator more. on this page. Use a XPI-like package to deliver the update. The update itself will contain a manifest of files which need updating/removal. The update may happen once the download is complete, at app shutdown, or the next time Firefox is launched.
That behavior is a policy decision to be decided upon by the user-facing update service. The application must not be running while the update is being installed. Our systems, including the JAR cache, are not designed to deal with changes to their underlying files. In addition, the Windows filesystem does not allow files to be unlinked from their parent directory while they are in use.
The Firefox executable will run a separate update binary (using execv or another method). This executable will process the update manifest and may leverage the binary patching technology of (with modifications for reliability). Once the update executable completes, it will re-launch the Firefox executable. This will allow Firefox to perform any post-upgrade operations (e.g., modifying registry keys, etc.).
Users will have the option to view silent upgrade progress, and choose to cancel, suspend, or 'complete it now.' They will also be provided with simple controls to alter the upgrade policy (notifications, silent or not, etc.). Downloading the Update Firefox will periodically check the Mozilla.org update servers (AUS) for available updates. The update server will return a manifest file (which is a simple XML file) over HTTPS that will point Firefox at the right update package to download. In silent download mode, Firefox will use byte-range requests (supported by the Mozilla.org mirror network) to download the update package in small pieces. Each time Firefox starts up it will check to see if it should resume downloading the update package.
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It will not try to download the update package while Firefox is not running. This simplifies the implementation of the downloading system because it enables us to make use of the Firefox networking stack.