Install from the Chrome Web Store

Install most standards-based Chrome extensions directly from their Chrome Web Store pages. Compatibility varies where an extension depends on Chrome-only APIs or a native companion.

Before you add it

Choose the Space and device that should own the extension. The package, enablement, permissions, storage, pinning, and website access remain independent from every other Space and device.

Install the extension

1. In Crest on Mac, open the extension’s page in the Chrome Web Store.
2. Select Add to Crest beside the store’s button.
3. Wait while Crest downloads the signed CRX3 package and verifies its developer and Web Store signatures.
4. In Crest's native review sheet, confirm Install In shows the intended Space.
5. Open Review Access and Compatibility. Read the signed source, requested Permissions, Website Access, and any Compatibility Warnings.
6. Select Add Extension.
7. When Crest confirms the extension was added, select Done.

The extension is enabled only in the Space and device shown during review. To change it later, open Crest Settings → Extensions and choose that Space. Options pages, pinned actions, and keyboard commands remain attached to this local installation.

Installation is not a universal compatibility promise

A package can verify and install while a later feature reaches a Chrome API that WebKit does not implement. Crest reports observed runtime failures as Needs attention instead of hiding them.

When Add Extension is unavailable

Crest disables installation when the current build cannot supply a declared requirement safely. The sandboxed App Store build blocks nativeMessaging. Crest Direct can offer that bridge only to verified Chrome Web Store installations whose identity exactly matches a registered host's allowed_origins; unpacked extensions and Safari-app native handlers are not eligible. Read Native companion limits instead of treating a different Safari app bundle as an automatic workaround.

Next: Manage permissions and website access.