The HP ALM Explorer Add-In enables you to use HP ALM without using a Web browser interface, such as Microsoft Internet Explorer. This is useful if you are unable to download ActiveX controls or if your browser restricts the use of ActiveX components. The only components that are downloaded when you use HP ALM Explorer are HP ALM components. It is still required to have some IE Explorer components running on the machine in order to access HP ALM.
Complete details on the add-in and direct link to download can be found in below link :