The Arc internet browser lets you customize (or vandalize) any website

Arc, a Mac-only internet browser from the aptly-named Browser Company, is one of those apps trying to reimagine a core computing tool. Years after we all decided that a stack of tabs at the top of a browser window is how we're doing things, Arc has a different approach. Like most modern apps, Arc puts everything in a sidebar and lets you build spaces that you can use to focus on a particular task. For example, all the research and documents I need for a particular article live in their own space...