Have you looked into Firefox Multi Account Containers? I use this extension to quickly switch between multiple tab groups, some of which do use SSO while using the same service (e.g. Outlook). Plus, you can easily create new tabs like Ctrl + Shift + (#1-9) to open a container of your choice among other shortcuts. I know it doesn’t meet all your criteria, but each tab group has its own colour and/or icon to make them distinct, while being in the same window

Developers decide what platforms they want to support based on what resources they have available and the kinds of users they wish to target. They create versions of software where they expect to garner enough market share or based on what gives them the most return on investment. Even at a 4% market share, Linux is still pretty much an edge case for many companies, though I agree that a corporation like Samsung can absolutely afford to make their software available on Linux

60% of the time it works every time

Unfortunately those aren’t safe either :/ The article mentions how several subs for the game Luigi’s Mansion got banned, even though they have nothing you do with Mangione

Try FitoTrack. I’ve been using it for awhile, measurements are very close to what Strava records. It does lack the social element though

Fun fact: the solar roof debuted on the Prius for the 2010 model year, in 2009

Perhaps Ladybird once it’s released?

Or simply Do Not Disturb