Automatically prefix 'https://' to redirected URLs if they fail parsing.

source/background-scripts/initialize.ts

@@ -68,7 +68,16 @@ browser.webNavigation.onBeforeNavigate.addListener(async (details) => {
         break;
       }
 
-      const redirectedUrl = redirect.redirect(url);
+      let redirectedUrl = redirect.redirect(url);
+      if (typeof redirectedUrl === 'string') {
+        try {
+          redirectedUrl = new URL(redirectedUrl);
+        } catch {
+          redirectedUrl = `https://${redirectedUrl as string}`;
+          redirectedUrl = new URL(redirectedUrl);
+        }
+      }
+
       await browser.tabs.update(details.tabId, {url: redirectedUrl.href});
       await browser.storage.local.set({
         latestTime: Date.now(),

source/redirect/base.ts

@@ -48,5 +48,5 @@ export abstract class Redirect {
     return false;
   }
 
-  public abstract redirect(url: URL | string): URL;
+  public abstract redirect(url: URL | string): URL | string;
 }

source/redirect/exports.ts

@@ -8,7 +8,7 @@ export * from './hostname.js';
 export * from './regex.js';
 export * from './simple.js';
 
-export type Redirects = HostnameRedirect | SimpleRedirect;
+export type Redirects = HostnameRedirect | RegexRedirect | SimpleRedirect;
 
 export function parseRedirect(
   parameters: RedirectParameters,

source/redirect/regex.ts

@@ -1,9 +1,9 @@
 import {Redirect} from './base.js';
 
 export class RegexRedirect extends Redirect {
-  public redirect(redirect: URL | string): URL {
+  public redirect(redirect: URL | string): string {
     const url = redirect instanceof URL ? redirect.href : redirect;
     const regex = new RegExp(this.parameters.matcherValue, 'gi');
-    return new URL(url.replace(regex, this.parameters.redirectValue));
+    return url.replace(regex, this.parameters.redirectValue);
   }
 }

source/redirect/simple.ts

@@ -1,7 +1,7 @@
 import {Redirect} from './base.js';
 
 export class SimpleRedirect extends Redirect {
-  public redirect(): URL {
+  public redirect(): string {
-    return new URL(this.parameters.redirectValue);
+    return this.parameters.redirectValue;
   }
 }

tests/redirect.test.ts

@@ -84,7 +84,7 @@ test('Redirect.redirect', (t) => {
     t.snapshot(
       {
         original: url instanceof URL ? url.href : url,
-        redirected: redirect.redirect(url).href,
+        redirected: new URL(redirect.redirect(url)).href,
       },
       `${index} ${redirect.constructor.name}`,
     );