Open MHT files in Firefox

When you start working with Cognos Active Reports you can save a report as a MHT file. To view these MHT files you can use Internet Explorer.

When you don’t want to use IE the alternative is Firefox. To open the MHT file you can use the plugin called UnMHT

UnMHT_Firefox_Plugin

You can find the plugin on this page: https://addons.mozilla.org/nl/firefox/addon/unmht/

After clicking on “Add to Firefox” you’ll get a warning

UnMHT_Firefox_Plugin_2

Click “Install” to finish the installation

After that drag a .mht file into the Firefox address bar and see the mht file gets opened properly

UnMHT_Firefox_Plugin_3

I must note that the functionality in Firefox is not the same as in Internet Explorer. The report is not really active.