Internet censorship techniques are constantly evolving. The magma guide's open collaborative structure allows users to distribute, modify, contribute, and review content - ensuring the guide stays as up-to-date as possible. <https://magma.lavafeld.org/> Introduction Conducting research on information controls can be complicated. The magma guide is here to help. This open-licensed, collaborative repository provides the first publicly available research framework for people working to measure information controls and online surveillance activities. In it, users can find the resources they need to perform their research more effectively and efficiently. The guide begins with a general overview of the basics of Internet censorship research ("Getting started"). It then walks users through a series of relevant methodologies, measurements, and analyses. After reviewing the guide, individuals will be able to create their own research plans and make better informed choices regarding the tools and procedures required to perform their work in an ethical and secure manner. The content of the guide represents industry best practices, developed in consultation with networking researchers, activists, and technologists. And it's evergreen, too--constantly updated with new content, resources, and tutorials. The host website is regularly updated and synced to a version control repository (Git) that can be used by members of the network measurements community to review, translate, and revise content of the guide. To get started, simply click on a topic in the left sidebar. Users who are conducting this type of research for the first time should begin with "Getting started" and move in sequential order through the topics. Users who already have a basic or better understanding of this type of work can use the search bar at the top right of this page to find more targeted information. [...]