This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Cari Bantuan

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Pelajari Lebih Lanjut

Utas ini telah diarsipkan. Silakan membuat pertanyaan baru jika Anda membutuhkan bantuan.

open mht in firefox quantum - unable to open the file in new browser version

  • 3 balas
  • 13 memiliki masalah ini
  • 5 kunjungan
  • Balasan terakhir oleh bgoodr

pradhip
pradhip
more options

I was using list of links created in mht file format and use them in multiple browsers. It used to work fine with older firefox browser versions with UnMHT addon. But the new addon is not compatible with Quantum, nor the browser supports it.

I am not able to use the browser because of this.

I was using list of links created in mht file format and use them in multiple browsers. It used to work fine with older firefox browser versions with UnMHT addon. But the new addon is not compatible with Quantum, nor the browser supports it. I am not able to use the browser because of this.

Semua Balasan (3)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

If you cannot be productive without UnMHT, you may need to temporarily roll back to Firefox 56 until you can export your MHT file to a standard format (e.g., Save Page As, Web page complete or if you don't need images or other external files, HTML only).

See: Install an older version of Firefox

Alternately, you could use Internet Explorer or another browser that reads .mht files to save it to a standard format that you then can open in Firefox.

the-edmeister
the-edmeister
  • Moderator
more options

MHTML format isn't an "official standard" in W3C standards. It remains "proposed" since 1999. Mozilla doesn't support "proposed standards". https://en.wikipedia.org/wiki/MHTML

IMO, there is a slight bit of incompatibility between the format that UnMHT saves to with how IE handles those files. So for me IE is a no-go.

My "solution" is to have an older version of Portable Firefox installed with the UnMHT extension so I can read the hundreds of MHT files that I saved over the last 12 years.

https://portableapps.com/apps/internet/firefox_portable

bgoodr
bgoodr
more options

I think what is needed is summed up here:

https://softwarerecs.stackexchange.com/questions/48138/software-to-convert-mht-mhtml-files-to-browser-and-platform-neutral-single-fi