I think xfif.dll plug-in is meant solely for XnView.
I have googled that name of browser plug-in for FIF used in times of Netscape was NPFIF.dll.
I assume
this thread from 2008 which mentions user with the same name as yours here and the same problem was a solution given to you back then.
Modern browsers switch from NPAPI plug-in architecture to Pepper API (PPAPI) architecture.
So to make older plug-ins work they have to be rewritten
or support for older type plug-ins has to be enabled in browser. If you still have NPFIF.dll, you may try.
Though no guarantee ten years old plug-in will work after enabling NPAPI support.
Few links about how to enable NPAPI support in modern browsers (if they still have one).
Enabling NPAPI in Chrome prior to version 45 (and why it is going to be abandoned)
Doing the same as above with pictures
How to manually install .dll plugin in Chrome I don't know if it works, I'm not using Chrome, but seems like it's using Firefox settings.
Enabling sandbox for NPAPI plug-in in Firefox
How to manually install NPAPI plug-in in Safari for Windows Answer from 5 years ago, but is the same as manually installing .dll plug-in in Chrome.
If you don't have NPFIF.dll but want to have one, googling for "fvp11w32.exe ftp" yields many FTPs where you can download installer for this browser plug-in. One of them
ftp://ftp.uni-potsdam.de/pub/systems/wi ... e-plugins/. But if you want only NPFIF.DLL and DECO_32.dll files without changes in registry made by installer, use
Universal Extractor. You have to use it twice - first to extract all files including one called DATA.Z from fvp11w32.exe (you can do it with WinRar too), second to extract everything including required .dll's from DATA.Z file (it is compressed with InstallShield and therefore is needed Universal Extractor).
My apologies to all moderators for turning this thread into offtopic.
