Seamonkey XPCOMGlueLoad error

Problem:

I updated Seamonkey on Linux Mint and it now won't launch. I am running a 64-bit version of Linux Mint.

In terminal, I tried to run Seamonkey but got an error similar to:

$ /path/to/seamonkey/seamonkey

XPCOMGlueLoad error for file /path/to/seamonkey/libmozgtk.so:
libgtk-3.so.0: cannot open shared object file: No such file or directory
Couldn't load XPCOM.

When checking, I do have GTK 3:

$ locate libgtk-3.so.0

/usr/lib/x86_64-linux-gnu/libgtk-3.so.0
/usr/lib/x86_64-linux-gnu/libgtk-3.so.0.1800.9

Solution:

It may be that you're attempting to run a 32-bit version of Seamonkey on 64-bit Linux Mint. The default Seamonkey download from Mozilla as of Jan 2018 is the 32-bit version.

You can find the 64-bit version in their releases page: http://archive.mozilla.org/pub/seamonkey/releases/

For example, for 2.49.1:

Notes:

This solution worked for Seamonkey 2.49.1 running on 64-bit Linux Mint 18.1 Serena as of Jan 2018. Your mileage may vary with other versions and configurations.

Also for the system tested, the auto-update is not an issue because this browser will only be used on a local network. (You'll see the note from Mozilla when you launch the browser... at least for version 2.49.1). Keep this in mind if your situation is different and you need a browser that reliably auto-updates.

References:

http://archive.mozilla.org/pub/seamonkey/releases/ http://forums.mozillazine.org/viewtopic.php?f=40&t=3005417