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I'd be interested in seeing implementation examples of adding 3rd party data from one (3rd party) web source to another for form completion, if you have them please?

Presumably this has to hack around cross-site restrictions nowadays (it's a couple of years since I did any website JavaScript).

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Here's one i made just now: https://gist.github.com/craigjperry2/83b81b7eaf5cf68ca042a9a...

1. Clone that repo

2. Run my fake vendor app - in this case an html page with an empty text box - npx http-server

3. Add the browser extension - tested in firefox - then refresh the page

Now you should see the title fields from https://jsonplaceholder.typicode.com/posts in a dropdown that's now been added to the input field of the fake vendor app page.

Extensions can request a higher level of permisions so you typically wont run into that issue.

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