"LiNuX uSeR iNsTaLlInG A BrOwSeR haha" meanwhile :

yay firefox

Yeah, totally.

Just imagine trying to do this with Windows Powershell, without a package manager like chocolatey to make it simple like linux...

$workdir = "c:\installer\"

If (Test-Path -Path $workdir -PathType Container)

{ Write-Host "$workdir already exists" -ForegroundColor Red}

ELSE

{ New-Item -Path $workdir  -ItemType directory }

$source = "https://download.mozilla.org/?product=firefox-latest&os=win64&lang=en-US"

$destination = "$workdir\firefox.exe"

if (Get-Command 'Invoke-Webrequest')

{

     Invoke-WebRequest $source -OutFile $destination

}

else

{

    $WebClient = New-Object System.Net.WebClient

    $webclient.DownloadFile($source, $destination)

}

Start-Process -FilePath "$workdir\firefox.exe" -ArgumentList "/S"

Start-Sleep -s 35

rm -Force $workdir/firefox*

its four words

When you choose a distro, you generally choose to follow what the maintainers give you as the "latest".
Or you get snap/flatpak/AppImage.

I, personally, would go with AppImage, probably because I once made some myself and liked them.

Can I update it from the inbuilt update tool in Firefox?

Universally regarded as a bad idea on Ubuntu based distros as far as my research goes.

Probably a PEBKAC issue...

Staying on the OTB repos in LTS distros and then complaining about software being slow to update is like staying on the OTB mirror, and then complaining that your download speeds suck.

I'm a Linux noob through and trough, use Glorious Mint, but like... How to get a newer version of VLC, than distributed by upstream is probably the first thing I figured out how to do.

Not unless you use the nightly repository.