1063069 - Navigating to about:config breaks the back button in e10s

Status: RESOLVED DUPLICATE of bug 999239

(Firefox :: Toolbars and Customization, defect)

Description

[(no longer active)]

STR:

1. Open a new tab and go to https://bugzilla.mozilla.org/show_bug.cgi?id=1059074.
2. Focus the location bar, type about:config and press enter.

The back button is disabled.

I get the following in the error console:

content is null tab-events.js:40

// bug 1024105 - content-page-shown notification doesn't pass persisted param
docShell.chromeEventHandler.addEventListener('pageshow', (e) => {
  if (e.target === content.document)  // <--- the bug
    sendAsyncMessage('sdk/tab/event', { type: e.type, persisted: e.persisted });
}, true);