You might have used specialized tools like Google Docs to collaborate online on documents. But, what if you can collaborate with anything that you see online?Well, the Hypothesis extension does just that. If you are reading an online document or a web page, you cannot annotate everything and collaborate with other users.Hypothesis allows you to converse in annotations, and hold discussions across texts. With mostly positive reviews from countless users, Hypothesis is easily a trusted open-source Chrome extension.