Within the xhtml tabs, If for some reason you dont see the Firefox view button, right click on the tab-bar- > Click on "Customize Toolbar" to repro the crash.
Bug 1831297 Comment 3 Edit History
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Within the xhtml tabs, If for some reason you dont see the Firefox view button, right click on the tab-bar- > Click on "Customize Toolbar" to repro the crash. Or Right Click->Duplicate tab