Linking more bugs for context: - bug 1688040 introduced weakened conditions that the patch in comment 2 rectifies. - Event page timeout handling for filterResponseData does not work correctly (added in bug 1759300). - bug 1762225 relies on a correct ExtensionViewLoaded message for background context tracing. An incorrectly timed message can result in missing persistent listeners.
Bug 1843846 Comment 4 Edit History
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Linking more bugs for context: - bug 1688040 introduced weakened conditions that the patch in comment 2 rectifies. - Without the fix in this bug, event page timeout handling for filterResponseData (added in bug 1759300) does not work correctly under the circumstances sketched in the initial report. - bug 1762225 relies on a correct ExtensionViewLoaded message for background context tracing. An incorrectly timed message can result in missing persistent listeners.