Cool! I had thought about doing the same but in a Chrome extension that would use Llama 3.2 with WebGPU, but when I tested it, it was very slow and sometimes crashed the browser.
I code and document code and imho Claude is superior, try to tell Gpt to draw a mermaid chart to explain a code flow... the mermaid generated will have syntax errors half of the time.
Imho IDs are more explicit, and a bless when working with large codebase apps, when trying to finding the related code to an element just grab the id and search for it.
IMHO not a minor strength, getting pixel perfect designs when SVGs are involved in Figma is near impossible, they are rendered in a very different way and in some cases the differences are huge.
I got my first dev job at a call center because bookmarklets, I was a phone operator and hacked some internal websites to improve the UX and the speed, everyone ended using these bookmarklets (coded in word and then minified running another script in the browser console).
Grease monkey is still alive, I added voice recording and speech to text transcription to Slack before they did.