Kantu for Chrome and Firefox
Kantu is the most popular open-source web macro recorder. If there’s an activity you have to do repeatedly, just create a web macro for it. The next time you need to do it, the entire macro will run at the click of a button and do the work for you. Kantu's main focus is ease of use, good recording and reliable playback for all kinds of browser automation projects. It is a record & replay tool for automated testing and a "swiss army knife" for general web automation, automating file uploads and autofill form filling. The new versions of Kantu for Chrome and Kantu for Firefox bring a major update - they can now run automated visual UI tests inside the web browser, powered by WebAssembly. This makes Kantu one of the first (or even the first?) browser extension that uses WebAssembly.
