I didn't take your comment as a troll -- I even considered mentioning that problem in my post. The trust and power that Firefox gives towards extension authors is certainly a strong point in its design for "power users" (letting, for example, Firefox adblockers prevent the ads from even being loaded, while Chrome adblockers can only hide the display elements). The thing is, though, no one browser is perfect; Firefox lacks Chrome's process isolation, support for the latest Flash plugin on Linux, I prefer Chrome's visual design and user interface, etc -- the point being that I prefer Chrome/Chromium for certain reasons external to extension capabilities, and I'm not willing to switch back to Firefox just to get my vim hotkeys to work on Google Reader.
I realize it's not fair to expect web app developers to adapt to my (or anyone else's) custom browser configuration, but in this particular case, they're adding vim hotkeys primarily as a convenience to fellow vim users, not as a defining feature of their site. Given that, I think they should be aware that there is a subset of those vim users who are negatively affected by their kindness.
Humorously, Chrome just completely crashed while I was writing this (running on the latest Quantal beta), prompting me to remove a bit I wrote about Chrome being more stable than Firefox due to its process isolation. I have a hunch that the fault lied in the Flash plugin, however, which doesn't seem to be terribly stable on Linux. I've never had a browser-wide crash on Chromium in the past, but not being able to watch certain Youtube videos and missing the convenience of Chrome's PDF plugin prompted me switch to it. Not sure I made the right decision.