Schematic Net Tracer (the website and the Chrome / Edge extension) processes PDF files entirely inside your browser.
chrome.storage.local): the interface language and whether .pdf links are intercepted.declarativeNetRequest (redirect .pdf navigations to the viewer), contextMenus (the "Open in Net Tracer" items), storage (the two settings above), tabs (open the current tab's URL in the viewer) and host access to http/https/file URLs (load the PDF you opened).Questions: open an issue at github.com/duntik/net-tracer.