Perform the following steps:

1. Save the PKCS #11 module to a permanent location on your local computer

2. SelectTools > Options or select theFirefox menu and thenOptions

3. Once the Options page opens, selectPrivacy & Security

4. Scroll down to the bottom of the page and underCertificates click or tap onSecurity Devices…

5. Click or tap theLoad button

6. Enter a name for the security module, such as "My Client Database"

   Warning:Be careful about using international characters as there is currently a bug in Firefox where international characters may cause problems.

7. ChooseBrowse… to find the location of the PKCS #11 module on your local computer, and then click or tapOK to confirm.

There are two environmental prerequisites for using thisAPI:

• One or morePKCS #11 modules must be installed on the user's computer
• For each installedPKCS #11 module, there must be anative manifest file that enables the browser to locate the module.

Most probably, the user or device administrator would install thePKCS #11 module, and its installer would install the native manifest file at the same time.

However, the module and manifest can't be installed as part of the extension's own installation process.

For details about the manifest file's contents and location, seeNative manifests.

pkcs11.getModuleSlots()

For each slot in a module, get its name and whether it contains a token.

pkcs11.installModule()

Installs the named PKCS #11 module.

pkcs11.isModuleInstalled()

Checks whether the named PKCS #11 module is installed.

pkcs11.uninstallModule()

Uninstalls the named PKCS #11 module.