I don't want to offend the extension creators, I want to option to uninstall an official extension and put my own or a community one but IMO there are reasons t

I don't want to offend the extension creators, I want to option to uninstall an official extension and put my own or a community one but IMO there are reasons to trust Mozilla then a stranger or a community. There were cases where popular extensions were bought and updated with malicious code, because of that I make sure I open bank or paypal website in a private window with extensions blocked but will a regular user know to do this ?