How to Find Extension ID in Opera GX
Quick Answer
To find extension ID in Opera GX, open the extensions manager (press `Ctrl + Shift + E` or type `opera://extensions` in the URL bar). In the top-right corner, turn the **Developer mode** toggle switch to ON. This will display a 32-character identifier labeled **ID** on each extension card.
What Is an Extension ID & Why Do You Need It?
An Extension ID is a unique, 32-character alphanumeric string generated by Chromium when an extension is compiled. This string acts as a system key, preventing file conflicts inside the browser.
You may need to find this ID when:
- Debugging Extensions: Troubleshooting crashes or conflicts between multiple installed tools.
- Locating Local Profiles: Deleting cache folders or recovering configurations inside your Windows AppData directory.
- Custom Shortcut Mapping: Assigning unique key hotkeys to run extension features.
Steps to Find the Alphanumeric ID
Locating these keys inside the Opera GX browser requires activating Developer Mode:
- Open the browser menu and select **Extensions > Extensions** (or press `Ctrl+Shift+E`).
- In the top-right corner of the Extensions dashboard, locate the **Developer mode** toggle switch.
- Click the toggle switch to enable it (it will turn blue).
- The dashboard will reload. Under the title of each extension card, you will now see an 'ID' field followed by a long string of letters.
Mapping IDs to Local Windows Directory Folders
Every extension you install stores its cache and user settings locally. Opera GX names these storage folders using the extension's unique 32-character ID.
On Windows, you can find these directories by opening Run (`Win+R`) and typing `%appdata%\Opera Software\Opera GX Stable\Extensions\`. By matching the folder name to the ID found in the browser, you can back up or clear specific extension data.
Data Matrix & Comparison
| Extension Name | 32-Character Extension ID (Web Store) | Primary Source Store | Primary Purpose |
|---|---|---|---|
| uBlock Origin | cjpalhdlnbpafiamejdnhcphjbkeiagm | Chrome Web Store / Opera Addons | Content filtering and ad blocking |
| LastPass Password Manager | hdokiejnpimhooofeeghhbkfacgbbaib | Chrome Web Store | Secure credential storage |
| Grammarly Writing Assistant | kibhgbcojclbeofhafffljpiagloeooc | Chrome Web Store | Spelling and grammar checking |
| Dark Reader UI Modifier | eimadpbcafnndhkihfjgbglhhjiajpcj | Chrome Web Store | Custom dark mode styling for websites |