Current releases use a default-release profile (i.e. default with the update channel appended). The other default profile is probably a profile used by on older Firefox version. You can check compatibility.ini in a profile to see what Firefox version last used a profile and you can also see from the last modified dates how old a profile is.

Current releases use a default-release profile (i.e. default with the update channel appended). The other default profile is probably a profile used by on older Firefox version. You can check compatibility.ini in a profile to see what Firefox version last used a profile and you can also see from the last modified dates how old a profile is.

In the default profile folder there are only 5 files and no compatibility.ini. Does this mean that this is an old profile which is no longer used now? And it can be deleted safely? i.e. If I delete the default profile it will in no way impact the working of the browser?

You may want to load the old profile first and see what is inside it before deleting it.

Note that if you would use this profile, then Firefox will upgrade this profile to the version you use.

What files and folders are in this profile?

Can you attach a screenshot?

• https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
• use a compressed image type like PNG or JPG to save the screenshot

Note that if you would use this profile, then Firefox will upgrade this profile to the version you use. What files and folders are in this profile? Can you attach a screenshot?

• https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
• use a compressed image type like PNG or JPG to save the screenshot

The following 5 files are there in the profile directory of the default profile are

1. cert8.db
2. key3.db
3. parent.lock
4. secmod.db
5. times.json

The screenshot is attached.