Firefox Community Forum

I was googling something related to my game and i clicked on a Reddit search result, which i made sure is the official Reddit website not some shady one, then an empty .htm file from moz-safe-about resource got downloaded randomly. I didn't open it, i uploaded it to VirusTotal which came out safe and then i instantly deleted it and ran a virus scan with Windows Security which also came out clean. i tried to recreate this by opening the same website again both on Firefox and other browsers like Zen(Firefox based) and Chrome but nothing happened.

is this a harmless bug or should i worry that it could be a virus that didnt get detected?

I can't tell if I've got a browser hijacker. I'm on an android phone on Firefox and using duckduckgo. I have avast antivirus, but the free version. And in the last 24 hours, sometimes when I type inquiries, usually if its a string of letters and numbers, it will redirect me to a website unrelated to my search. For instance, typing in mig23(looking up fighter jet), it won't do searches and instead will take me to some UK boat website. "OICE", a typo, takes me to a NASA OIIR website. It appears to be close to whatever I typed in, but also doesn't happen every single time. This doesn't happen on my other devices, but it also doesn't happen when I use google in Firefox. However, it is possible that this happened on my laptop but I do not have access to it right now.

I am always in fear of viruses and I desperately want this to be a computer glitch. I cleared the DNS cache, I deleted some files and apps and rebooted and its still happening! I don't know what file could've done it.