Firefox: avoid menu actions firing twice (#109374)
Firefox: avoid menu actions firing twice (#109374)

* :lipstick:

* fix #108621
microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Microsoft/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,eamodio/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,microsoft/vscode,Microsoft/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Microsoft/vscode,eamodio/vscode,microsoft/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,eamodio/vscode,Microsoft/vscode,Microsoft/vscode,eamodio/vscode