This latest update incorporates feedback from multiple reviews to enhance the extension's stability, security, compatibility, and code quality.

Here's a summary of the key changes:

**Core Issues Addressed and Significant Improvements:**

1.  **Manifest V3 Compatibility:**
    *   The `'blocking'` option for the `webRequest.onBeforeSendHeaders` API is now dynamically added based on the manifest version, aligning with Manifest V3 specifications.
    *   Improved usage of the `sidePanel` API, prioritizing `Browser.sidePanel` and adding a fallback to `chrome.sidePanel` for better cross-browser compatibility.
2.  **Security Enhancements:**
    *   Significantly improved the `redactSensitiveFields` function: expanded the `SENSITIVE_KEYWORDS` list (including 'apikey', 'token', 'secret', 'password', 'auth', 'key', 'credential', 'jwt', 'session', 'access', 'private', 'oauth', etc.), added sensitivity checks for string content within arrays, and used `WeakSet` to handle circular references, preventing sensitive information leaks.
3.  **Error Handling and Stability:**
    *   **Proxy Connection (`setPortProxy`, `_proxyOnDisconnect`):**
        *   Implemented a more robust reconnection mechanism, including exponential backoff and a maximum retry limit (`RECONNECT_CONFIG`).
        *   Thoroughly cleaned up related event listeners (including `onMessage` and `onDisconnect` on `port` and `port.proxy`), especially after reaching the maximum reconnection attempts, to prevent memory leaks.
        *   Improved handling of race conditions when removing `port.proxy` listeners.
        *   When the connection ultimately fails, you will be notified via `port.postMessage`.
    *   **`FETCH` API Handling:** Added an `ok: response.ok` field to the returned result and logs a warning when `!response.ok`. The suggested modification to include an `error` field in the result has also been implemented.
    *   **`postMessage` Serialization Errors:** Added `try-catch` protection to multiple `postMessage` calls in the background script.
    *   **Promise Polling (`prepareForJumpBackNotification`):**
        *   Added a `cleanup` function to the polling logic for Claude and Kimi tokens, combined with a `promiseSettled` flag, to prevent race conditions and memory leaks.
        *   In the `setInterval` callback, if `promiseSettled` is already true, a warning log is added.
        *   (Note: The suggestion regarding a counter for consecutive polling failures was not fully implemented due to time and complexity constraints, but the existing timeout mechanism and rejection for specific errors already handle most situations.)
    *   **DOM Operation Protection:** Added a null check for the `input` element in the `setTimeout` callback of `manageChatGptTabState`.
4.  **Linting and ESLint Configuration:**
    *   Resolved the `'chrome' is not defined` issue in the CI environment by standardizing API usage to `Browser.*`.
    *   Added `"node": true` to `env` in `.eslintrc.json`.
    *   All modifications passed local `npm run lint` checks.

**Code Quality and Readability (Suggestions from CodeRabbit & Copilot):**
*   Applied optional chaining (`?.`) in several suggested places, simplifying the code.
*   Added JSDoc comments for the `RECONNECT_CONFIG` constant.
*   Standardized some logging levels (e.g., `console.debug` in `setPortProxy`).

**Addressing the Latest Review (Key Focus of Pre-Submission Final Check):**
*   **`redactSensitiveFields` Handling Objects in Arrays:** Ensured recursive calls are made when array elements are objects.
*   **`SENSITIVE_KEYWORDS` Completeness:** Reconfirmed the completeness of the list.
*   **`webRequest` `'blocking'` Option:** Confirmed the Manifest V3 compatibility modification is correct.
*   **`FETCH` Error Handling:** Confirmed `responseObject.error` has been added as suggested.
*   **`_proxyOnDisconnect` Listener Cleanup:** Confirmed that after maximum retries, both `port._portOnMessage` and `port._portOnDisconnect` will be attempted to be removed.

This iteration is the result of multiple reviews and fixes. While some very minor suggestions (like dynamic selectors for Kimi's login button) or global logging level management (introducing `isDebugMode`) were not fully implemented due to complexity or time constraints, the core error, stability, and security issues have been addressed.

Author: google-labs-jules[bot]