FileHippo no longer actively hosts Firefox 52, but if a third-party archive shows it:
MajorGeeks is a reputable alternative to FileHippo. They manually scan files and offer a clean "Verified Freeware" tag for Firefox 52 32-bit. mozilla firefox 52 32bit download filehippo verified
Historically, has been a trusted source because they: FileHippo no longer actively hosts Firefox 52, but