This may seem like a basic question , but I am asking because I felt Firefox was not as fast or responsive as before, and scrolling felt sluggish , so I attempted a reinstall by deleting all the Firefox files I could find . Still experiencing the speed problem , that’s why I have a question if deleting those files could affect when I reinstall

It looks like you also removed the profile data. If so, Firefox will create a new one.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding

https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster

https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-ram

https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding

What issue(s) did you have with Firefox ?

Note that you can use the Profile Manager to create a new profile in case a refresh isn't working (a refresh can possibly carry over some issues).

Firefox uses two locations for the Firefox profile folder.

Location used for the main profile that keeps your personal data (Root Directory on about:profiles).

• ~/Library/Application Support/Firefox/Profiles/<profile>

Location used for the disk cache and other temporary files (Local Directory on about:profiles).

• ~/Library/Caches/Firefox/Profiles/<profile>

• https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data