(There's no video for Netscape Communicator 4.0.4 + 4.0.8 (68K) yet. Please contribute to MR and add a video now!)
Netscape Communicator 4.0.8 was the last version to support 68K architecture.
Netscape Communicator 4 featured:
Comm4.08_Complete_US_68K.bin (7.08 MiB / 7.42 MB)
Netscape Communicator v4.0.8 for 68K, BinHex'd (use Stuffit Expander) / Binary encoded, use Stuffit Expander
Communicator_4.04_68K.sit (4.6 MiB / 4.83 MB)
Netscape Communicator v4.0.4 for 68K / compressed w/ Stuffit
Architecture: 68K + PPC (FAT)
Mac OS 7.5 - Mac OS 9.2.2
At least 2MB of free RAM
Note: version 4.0.8 requires CFM-68K Runtime Enabler and ObjectSupportLib extension to work on Mac OS 7.5 but version 4.0.4 works straight away on Mac OS 7.5.
Emulating this? It should run fine under: SheepShaver