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Cross browser extensions
Browser extensions were a huge mess until not so long ago. Today with new WebExtensions API they are much more accessible and we can develop extensions that work inside all major browsers and share the same codebase. Other then intro into this new API, you will also hear about concepts, gotchas and ideas on how to use web extensions to enhance user experience on your website or app. Also, for old school guys, the secret guest will make a comeback.