feat: support running Puppeteer in extensions (#12459)

packages/puppeteer-core/src/cdp/ExtensionTransport.ts

@@ -30,7 +30,7 @@ const pageTargetInfo = {
  * implements missing commands and events.
  *
  * @experimental
- * @internal
+ * @public
  */
 export class ExtensionTransport implements ConnectionTransport {
   static async connectTab(tabId: number): Promise<ExtensionTransport> {
@@ -178,5 +178,6 @@ export class ExtensionTransport implements ConnectionTransport {
 
   close(): void {
     chrome.debugger.onEvent.removeListener(this.#debuggerEventHandler);
+    void chrome.debugger.detach({tabId: this.#tabId});
   }
 }

packages/puppeteer-core/src/util/Function.ts

@@ -31,7 +31,16 @@ export function stringifyFunction(fn: (...args: never) => unknown): string {
   let value = fn.toString();
   try {
     new Function(`(${value})`);
-  } catch {
+  } catch (err) {
+    if (
+      (err as Error).message.includes(
+        `Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive`
+      )
+    ) {
+      // The content security policy does not allow Function eval. Let's
+      // assume the value might be valid as is.
+      return value;
+    }
     // This means we might have a function shorthand (e.g. `test(){}`). Let's
     // try prefixing.
     let prefix = 'function ';