Ask HN: How do I normalize text width as a client across devices?

I realized recently I find text flow in variable browser sizes very disorienting.

For example: the text on URL X on my phone is a lot easier for me to remember then the same URL on my laptop or desktop browser. This is because I'm always resizing my browser on a desktop or laptop while on my phone, the text is always on the same place when I read it. This is really helpful for remember for some reason.

Is there an extension or some pattern of browsing I can use to make sure my desktop experience is consistent across browsers? Something like "right click, set browser width to 120 ems"?