Hi. Can I launch an instance with the specified profile? The "-p" switch doesn't work.
New: StressMyPC (Dec 10, 2025), Platform 30.1.3 (Nov 17, 2025)
1,400+ portable packages, 1.2 billion downloads
We're close to breaking even this year, please donate today
December 2025 Site Slowdown Being Addressed
That switch is only for locally installed profiles. We use the -profile switch to make it portable which overrides -p. If you'd like another profile, install the second profile launcher: https://portableapps.com/support/firefox_portable#second_profile
Sometimes, the impossible can become possible, if you're awesome!