As you may be aware, we have disabled service workers in all ESR releases since it was implemented. At first this was because it was a big new feature with security implications. Then it was because we realized we needed to rewrite a lot of code to properly support multi-e10s. Back porting security fixes across such a rewrite would be quite difficult.
Unfortunately it looks probable that we will need to disable service workers in FF59 ESR as well. There is some small hope that we will complete the service workers e10s rewrite in FF59. However, its also very likely this will not get done given that the all hands, holiday, and company-wide extended PTO is taking place in this cycle. You may be asking, how close is the service worker e10s rewrite? Have you guys made any progress? Let me provide a brief update of where we are: - The main blocker has been bug 1293277 as it is necessary to provide cross-process primitives we can use in ServiceWorkerManager and necko. - I am now splitting off patches from the mega-patch in bug 1293277 and landing them as they are reviewed. - I expect bug 1293277 to 100% be done in FF59 and hopefully before the holiday. - We have also extricated the parent-side service worker interception code from the main http cache path in bug 1391693. This will make it easier to refactor interception as it isolates us from some necko complexity. - After bug 1293277 is done there will be additional work to use the primitives throughout the ServiceWorkerManager to enable it to live cross-process. - We also need to update prototype work to do service worker launch and event dispatch remotely from the parent process. - We can then switch to performing all service worker interception and life cycle management in the parent process. - There will also probably be a reasonably long tail of stability and performance issues to fix. Fortunately we have a pretty good test suite to avoid functional regressions. At the end of the day we all would like this complete so we could enable in ESR, but I think the amount of work remaining is challenging given the holiday/all-hands cycle. Realistically we should plan on service workers being disabled in FF59 ESR. Please let me know if you have any questions or concerns. Thanks. Ben _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
