Rated 5 out of 5 stars
I've used this addon forever. For Firefox 6.0, I right-click SAVE LINK AS Unmht 5.6.9 from https://addons.mozilla.org/en-US/firefox/addon/unmht/eula/114681?src=addondetail. Then with Nightly Tester Tools "Force Addon Compatibility" enabled, I used menu File,Open File and selected unmht-5.6.9.xpi to install unmht. After Firefox restart, I successfully used Unmht 5.6.9 on a webpage to save as mht.This review is for a previous version of the add-on (5.6.9).