I love the idea of Vim shortcuts in the browser, but I'm becoming increasingly uncomfortable with the permissions these extensions require. I get why it's necessary for them to work, but giving access to all history/tabs/browser data feels a bit intense.
At least current browsers now show/ask for such permissions individually. You probably don't want to know how many permissions things like old XUL/XPCOM extensions would have required had they been forced to ask the user for them individually.