In my role I have to do a lot of testing on different browsers so the least amount of friction is little to no customization, the only plugins are the ones I need for testing and nothing else.
When I was a developer, I fell into the trap of trying to customize everything, only to have to keep doing it once a new browser or extension came out. I gave up trying to get something exactly the way I wanted it.
I use as close to stock as possible in order to avoid the kind of friction you're talking about.
Or you can stick to your old already customized browser and avoid the trap/friction! I mean, if were able to ditch everything completely, you should've been able to just stop checking everything new and shiny?
How is switching between a couple different web browsers any way cognitively different from context switching between a browser, code IDE, database client, and terminal windows?
You're not doing exactly the same tasks in other apps like you do in a browser, so you don't have browser-specific workflows you're used to that would break down.
For example, you have a browser where you can set up a shortcut _C_ to copy the current page URL to your clipboard. You've developed muscle memory of doing that, so feel it in another browser where it can't be set up that way.
You don't need that in a database client, so you'll never notice the difference there because you'll never use that shortcut
You won't be able to switch multiple times a day without noticing a lot of friction as you common workflows break down