1337160 - Installing a WebExtension causes major sessionrestore and nonmain_startup_fileio Talos regressions

Status: RESOLVED DUPLICATE of bug 1317681

(WebExtensions :: General, defect)

Description

[Jared Wein [:jaws] (please needinfo? me)]

To confirm this, I added a new system add-on to my local build with an empty manifest (only declaring the manifest_version, name, version, description and icon). I confirmed that the add-on is loaded by visiting about:debugging.

I then pushed that empty webextension to tryserver as well as a push without that extension added. See the perfherder results:

https://treeherder.mozilla.org/perf.html#/compare?originalProject=try&originalRevision=da5c0fe84a319b67235f572480ddc9336627b63d&newProject=try&newRevision=fed5169c7c1d6cc24a86b8f68568299ad2b575e5&framework=1

Comment 1

[Jared Wein [:jaws] (please needinfo? me)]

Attachment: empty-webextension.patch

Comment 3

[Jared Wein [:jaws] (please needinfo? me)]

Base try push:
https://treeherder.mozilla.org/#/jobs?repo=try&revision=da5c0fe84a319b67235f572480ddc9336627b63d

Webextension without icon:
https://treeherder.mozilla.org/#/jobs?repo=try&revision=071a2d49ef583815184c309da62ca03806697cf4

Webextension with icon:
https://treeherder.mozilla.org/#/jobs?repo=try&revision=fed5169c7c1d6cc24a86b8f68568299ad2b575e5

Compare base -> webex without icon:
https://treeherder.mozilla.org/perf.html#/compare?originalProject=try&originalRevision=da5c0fe84a319b67235f572480ddc9336627b63d&newProject=try&newRevision=071a2d49ef583815184c309da62ca03806697cf4&framework=1

Compare base -> webex with icon:
https://treeherder.mozilla.org/perf.html#/compare?originalProject=try&originalRevision=da5c0fe84a319b67235f572480ddc9336627b63d&newProject=try&newRevision=fed5169c7c1d6cc24a86b8f68568299ad2b575e5&framework=1

Compare webex without icon -> webex with icon:
https://treeherder.mozilla.org/perf.html#/compare?originalProject=try&originalRevision=071a2d49ef583815184c309da62ca03806697cf4&newProject=try&newRevision=fed5169c7c1d6cc24a86b8f68568299ad2b575e5&framework=1