Even if everything in your life happened via the web, there's no requirement you do that via a single browser instance. The better attitude to take is the more

Even if everything in your life happened via the web, there's no requirement you do that via a single browser instance. The better attitude to take is the more things you do via the web, the more important it is to have good operational hygiene and separation of concerns with regards to your browser use. Stop treating tabs as sufficient separation of concerns. Use browser instances. Put them in containers or even VMs if you can afford to.