Show HN: Mod&Dot, a web design and devtools extension

Mod&Dot is a new design tool for anyone who works on websites. This is an early concept and I'm looking for advice.

https://mod-dot.com/teaser/

After a site launches, revising the design can be a pretty frustrating process. Designers have to learn git and command line. Or developers have to parse font sizes from redlined screenshots. Clients make printouts and draw on them. Etc.

Mod&Dot gives a simple place to collaborate on website edits by saving & sharing changes made in DevTools. Anyone can add comments without using DevTools, too.

What do you think? Would love some input.