pdfjs-dist/extensions/chrome/pdfHandler.html

<!doctype html>
<script>
chrome.experimental.webRequest.onBeforeRequest.addListener(
  function(details) {
    var viewerPage = 'content/web/viewer.html';
    var url = chrome.extension.getURL(viewerPage) + '?file=' + details.url;
    return { redirectUrl: url };
  },
  {
    urls: [
      "http://*/*.pdf",
      "file://*/*.pdf",
    ],
    types: [ "main_frame" ]
  },
  ["blocking"]);
</script>
Initial Chrome extension import 14 years ago			`<!doctype html>`
			`<script>`
			`chrome.experimental.webRequest.onBeforeRequest.addListener(`
			`function(details) {`
Add content/ to the viewer.html path 14 years ago			`var viewerPage = 'content/web/viewer.html';`
			`var url = chrome.extension.getURL(viewerPage) + '?file=' + details.url;`
Initial Chrome extension import 14 years ago			`return { redirectUrl: url };`
			`},`
			`{`
			`urls: [`
			`"http:///.pdf",`
			`"file:///.pdf",`
			`],`
			`types: [ "main_frame" ]`
			`},`
			`["blocking"]);`
			`</script>`