There is no major mainstream site called "Modsfire." It is highly likely you are referring to "msfsaddons.com" (often confused due to similar naming conventions) or "Flightsim.to", or perhaps a file-hosting service. Alternatively, you may be looking for the "FlyByWire" modification, which is the most popular A320 mod currently available.
The only reason "A320 Modsfire" persists is because new simmers do not know where to look. Education is the solution. Share this article, link to official sources, and help clean up the community.
The A320 ModsFire refers to a highly modified Airbus A320 aircraft that has been upgraded with advanced features and technologies designed to enhance performance and modernization. This "feature" typically covers a suite of technical enhancements that build upon the baseline A320 architecture. Key Modifications and Features
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