Manual Installation via MSI
There is no way to manually install an Internet Explorer add-on contained in a CAB file. However, you can manually install via MSI.
Download an MSI installer (Microsoft Windows Installer) file for Authentic Browser from the Altova website. This file is an executable installer file (with a .exe extension) that installs the Authentic Browser plug-in in the supported browsers (Microsoft Internet Explorer 32-bit and 64-bit) currently installed on the client machine.
Installation
Download the MSI installer file to the client machine and double-click it to start the installation. The plug-in will be installed (by default to the folder: C:\Program Files (x86)\Altova\AuthenticBrowserPlugin\…) and integrated in the currently installed supported browsers in one step. Selective installation for different browsers is possible via the Custom Installation dialog.
The Add/Remove Programs list on a client machine will show the installed browser edition.
MSI versions
There is an MSI installer file for each supported language (English, German, Spanish, French, Japanese), each trusted/untrusted type, and each 32-bit/64-bit browser-type. So, for example, there will be one MSI installer file for English Trusted 32-bit browsers, another for English Trusted 64-bit browsers, another for English Untrusted 32-bit browsers, and so on.
For more information about versions, see Authentic Browser Versions