Alias syntax for Firefox 'cfx run -profile <dir>'

Question

I would like to know how to do set-alias in PowerShell for the cmd used in developing Firefox extension:

cfx run -p C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\ripltbxm.cfxp

I've added the following to Microsoft.PowerShell_profile.ps1:

Set-Alias cfxp cfx run -p "C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\ripltbxm.cfxp"

But when PowerShell is launched, it shows the error:

Set-Alias : A positional parameter cannot be found that accepts argument 'run'.
At D:\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1:2 char:1
+ Set-Alias cfxp cfx run -p "C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profil ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Set-Alias], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.SetAliasCommand

Also tried:

Set-Alias cfxp "cfx run -p C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\ripltbxm.cfxp"

with another error:

cfxp : The term 'cfx run -p C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\ripltbxm.cfxp' is not recognized
as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was
included, verify that the path is correct and try again.
At line:1 char:1
+ cfxp
+ ~~~~
    + CategoryInfo          : ObjectNotFound: (cfx run -p C:\U...s\ripltbxm.cfxp:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

Answer 1

In PowerShell aliases can be defined only for commands or cmdlets, not for entire commandlines with parameters:

NAME
    New-Alias

SYNOPSIS
    Creates a new alias.
[...]
DESCRIPTION
    The New-Alias cmdlet creates a new alias in the current Windows
    PowerShell session. Aliases created by using New-Alias are not
    saved after you exit the session or close Windows PowerShell. You
    can use the Export-Alias cmdlet to save your alias information to
    a file. You can later use Import-Alias to retrieve that saved
    alias information.

PARAMETERS
[...]
    -Value <String>
        Specifies the name of the cmdlet or command element that is
        being aliased.

You'll need a custom function if you want a shorthand for running a particular command with parameters.

function cfxp {
  & cfx run -p "$env:APPDATA\Mozilla\Firefox\Profiles\ripltbxm.cfxp"
}