Fix bz#1823729 - Listen only for status on tab updated

[dannycolin]

See https://bugzilla.mozilla.org/show_bug.cgi?id=1823729#c9

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• I agree to license my code under the MPL 2.0 license.
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Description

tl;dr If a tab never reach the complete readyState, we can end up in a situation where a frequent (and likely never ending?) sequence of tabs.onUpdated events are triggered. This can create performance issues in a session with a large amount of tabs. By only tracking the onUpdated events we really need, we can considerably reduce the numbers of events and prevent any performance issues.

See https://bugzilla.mozilla.org/show_bug.cgi?id=1823729#c9

Type of change

Select all that apply.

• Bug fix
• New feature
• Major change (fix or feature that would cause existing functionality to work differently than in the current version)

Tag issues related to this pull request:

• Bugzilla 1823729