I just tried the YouTube plugin, it's really great! but it couldn't force 240p (I have a slow internet connection so i need to have this low quality option) and there is a keepaas plugin for chrome too [1] it even has a version for Firefox! but from what I read in its description, keeFox is the better addon.
[1] https://chrome.google.com/webstore/detail/chromeipass/ompiai...
Chrome Web Store: https://chrome.google.com/webstore/detail/youtube-options/bd...
Developer's site: https://spoi.com/software/yto/
I'm surprised to hear that you've not found a KeePass addon for Chrome. I'm using LastPass right now, but I've been thinking of switching to take advantage of KeePassDroid on Android. Do the popular options on the Chrome Web Store not pass muster?