There is only one file type that uses the .MHT extension:
MHTML Web Archive
You can open MHT files with various web browsers, including Google Chrome and Microsoft Edge, whether you are online or offline. However, MHT files saved in one web browser may appear differently when opened in another web browser since there is no standardized MHTML format utilized among all browsers.
You can also use applications besides web browsers to open MHT web archives. Examples include Microsoft Word and Kingsoft Writer.
Files with the .mht extension may be utilized by cybercriminals to distribute dangerous malware so you should verify the source you received the MHT file from before opening it.
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|Microsoft Internet Explorer||Freeware|
|Mozilla Firefox||Open Source|
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Updated: January 30, 2021