Add invidious instances by default for safari

https://github.com/ajayyy/SponsorBlock/issues/798

webpack/webpack.manifest.js

@@ -3,6 +3,7 @@
 const webpack = require("webpack");
 const path = require('path');
 const { validate } = require('schema-utils');
+const invidiousList = require("../ci/invidiouslist.json");
 
 const fs = require('fs');
 
@@ -49,6 +50,11 @@ class BuildManifest {
             mergeObjects(manifest, chromeManifestExtra);
         }  else if (this.options.browser.toLowerCase() === "safari") {
             mergeObjects(manifest, safariManifestExtra);
+
+            // Add all invidious instances as options for the content script
+            for (const instance of invidiousList) {
+                manifest.content_scripts[0].matches.push(`*://*.${instance}/*`);
+            }
         }
 
         if (this.options.stream === "beta") {