Closed Bug 793139 Opened 9 years ago Closed 3 years ago
Provide a simple sync API to just get an add-on's version, without requiring database access
A common usage pattern for the Add-ons Manager API is for an add-on to fetch its own Addon object, for the sole purpose of getting it's version. That saves the developers needing to keep a version string updated in multiple places, and it's useful for detecting upgrades, displaying the version in the UI, etc. However, doing that requires database access. If an add-on is doing that on startup, then we're always opening the database on startup - which comes with a startup performance cost. Also, its just a needless complex async API just to get a version string. For that use-case, we could provide a simple sync API: AddonManager.getAddonVersion(aID); XPIProvider can use extensions.installCache to find the installed version. I think all the other providers can already do this synchronously (not that I've seen any need in the wild for other providers to support that).
Er, for a moment I thought extensions.installCache included the version - of course it doesn't. But extensions.enabledAddons and extensions.bootstrappedAddons do! And this is the 2nd reason to convert extensions.enabledAddons to store JSON, the other being bug 791987. Filed bug 793143 for that.
A related use case for this is something I see AdBlock Plus doing - ABP modifies its behaviour depending on whether you have another addon installed, so it queries AddonManager looking for that other addon during initialization.
4 years ago
No longer depends on: 793143
The use case presented here doesn't apply for webextensions (they can use something like browser.runtime.getManifest() ) For internal use, we have AddonManager.getActiveAddons() which doesn't cover this exactly but I don't think there's much point keeping this bug open.
Status: ASSIGNED → RESOLVED
Closed: 3 years ago
Resolution: --- → WONTFIX
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