You must be the life of party, huh.     Good that you pointed that out, though.  Also, plugins at /usr/lib/mozilla would be shared, and maybe there are more shared resources..

pedro:

Thanks for the info link.

Maybe there's a way to set the second firefox to use something other than ~/.mozilla to store its files.

Profiles:
https://developer.mozilla.org/en-US/doc … e_profiles

" withouth the need of deinstalling firefox 60 esr"

Hm...  that's a good to know.  Now I can have both versions installed without conflict because the older version is outside the apt system.

You might run into conflicts with extensions. Maybe there's a way to set the second firefox to use something other than ~/.mozilla to store its files.

Hm...  that's a good to know.  Now I can have both versions installed without conflict because the older version is outside the apt system.

"Find the older package in /var/cache/apt/archives and install it... "

This particular old package was not in the cache archive.  I am guessing that's because I purged it (instead of uninstalling it) and that also removed the package from the cache as well?

Thanks for the info.  Good to know how to roll back to an older package no longer available at repo.

kapqa:

"to install firefox 52.9 i download it from ftp and then just change the shortlinks in "favored applications" to the firefox directory ..."

I basically did the same - downloaded the older version tar package from mozilla archive.  Are "favored apps" links  the same as "preferred apps" links?

https://archive.mozilla.org/pub/firefox … 52.9.0esr/

Let me steer this into a more general devuan topic.

When you need to roll back an update or install an older version of a package, how would you go about it?

Find the older package in /var/cache/apt/archives and install it wtih

dpkg --force-downgrade -i <package>

When you need to roll back an update or install an older version of a package, how would you go about it?

SeaMonkey does not support Encrypted Media Extensions and therefore cannot load the Widevine Content Decryption Module.

It doesn't matter because the OP didn't mention that as a requirement; he or she requires support for the old type of Firefox extensions. If someone also wants support for Widevine, then I recommend using Chromium, or a web browser based on Chromium such as Google Chrome, Opera, Vivaldi, etc. After all, there's nothing stopping anyone from having more than one web browser.

Phil

SeaMonkey does not support Encrypted Media Extensions and therefore cannot load the Widevine Content Decryption Module. Firefox Quantum does support Encrypted Media Extensions so I think that is your most feasible option. If you already have a paid service like Netflix - you will be unable to watch it using SeaMonkey either.

That's a good example how netflix and similar services take hostages. By the way, such services runs miners on end user computers. If someone don't want third party miners the one can run virtual machine with proprietary components in guest system for netflix watching. It won't guarantee security and privacy but it's a step forward on the way of understanding the problem.

Most of people probably imagined cryptominers when i used the word "miners". However, cryptomining is datamining. Any datamining without permission of end user is wrong thing.

It really isn't safe to use older browser versions. Have you considered using browsers that support legacy extensions and are still maintained with security and bug fixes? There's Pale Moon, Basilisk, and Iceweasel-UXP to choose from (and the upcoming Borealis Navigator). There are still choices out there. While it can't be said that all legacy extensions will work on them, the vast majority will.

There's also SeaMonkey, and there's a deb package available for it from MX Linux.

For info on using the MX Linux repo with Devuan, see:
https://dev1galaxy.org/viewtopic.php?pid=17503#p17503

Phil