Steps to reproduce:
The link to the extension is https://chrome.google.com/webstore/detail/scispace-copilot/cipccbpjpemcnijhjcdjmkjhmhniiick
This extension is like a copilot help users read website or pdf. Currently it works well on Orion for website:
For example: https://proceedings.mlr.press/v139/xie21c.html

However for PDF opened in Orion, it does not work (open this link http://proceedings.mlr.press/v139/xie21c/xie21c.pdf then click on the extension button, nothing happens)

Expected behavior:
In Chrome, open a pdf then enable the extension looks like this

If copy the link above in the Chrome address bar chrome-extension://cipccbpjpemcnijhjcdjmkjhmhniiick/pdfViewer.html?file=http%3A%2F%2Fproceedings.mlr.press%2Fv139%2Fxie21c%2Fxie21c.pdf to Orion, it works:

Thus I think making Orion compatible with this extension should be relatively easy. Highly suggest make Orion compatible with this extension. This extension get 10,000+ users within one week after released.
Orion, OS version; hardware type:
Version 0.99.123.3-beta (WebKit 615.1.16.1)
MacBook Pro (macOS Ventura 13.3.1 build 22E261)