Currently [browser_tabCloseSpacer uses overflowTabs as defined in its own file](https://searchfox.org/mozilla-central/rev/0948667bc62415d48abff27e1405fb4ab4d65d75/browser/base/content/test/tabs/browser_tabCloseSpacer.js#64-90). With the introduction of the shared-head.js file from Bug 1778450, this test should be changed to use the shared-head implementation instead.
Bug 1791438 Comment 0 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Currently [browser_tabCloseSpacer uses overflowTabs as defined in its own file](https://searchfox.org/mozilla-central/rev/0948667bc62415d48abff27e1405fb4ab4d65d75/browser/base/content/test/tabs/browser_tabCloseSpacer.js#64-90). ~~With the introduction of the shared-head.js file from Bug 1778450, this test should be changed to use the shared-head implementation instead.~~ Trying to use shared-head.js resulted in having to fight the linter, so I moved the helper function into BrowserTestUtils instead. We should use the shared function from BrowserTestUtils.