jtvjan parent
Probably. I used that add-on a while ago, and it also modifies your form submissions. Learnt that the hard way.
One of our lead developers used it at the height of cloud hype. You could always tell which pages of our internal wiki he had edited recently. Amusing at first, but I got tired of it much faster than he did.
You just need a butt-to-cloud extension to counter that.
Here's a fork that fixes that: https://chrome.google.com/webstore/detail/cloud-to-butt-redu...
Wow, Google won't let me look at that without giving them a credit card number or uploading a copy of state ID. To prove I'm old enough to to responsibly handle the word 'butt'. Because if you can get your hands on a credit card number, that proves it.