From the facebook settings you can download your friend information as json
1) go here https://www.facebook.com/settings?tab=your_facebook_information
2) view 'Download Your Information'

3) Deselect All

4) select friends

5) choose json as the output

6) Create File

With this json output, we need an importer built to create contacts in monica
We could do a similar thing with messages
This is a deal breaker for me in order to use Monica! Really needed!
I believe other people who want to start with Monica would see this the same way. It is the most painful thing and obstacle.
EDIT: I have just downloaded data about my friends in JSON and it seems like Facebook gives you only a VERY limited information, e.g.:
{
"name": "Peter Stanislav",
"timestamp": 1558280107
},
Facebook's Graph API no longer provides friends_list data. The unethical route would be to use a facebook scraper. It may be worth exploring if using a chrome extension that captures this data is legal.
Right, that's what I did. Installed this Toolkit for FB Chrome Extension which allowed me to get a very nice piece of information about all my friends in one click:
{
"uid": number,
"photo": path_to_profile_pic,
"path": path_to_profile,
"fullName": ...,
"firstname": ...,
"lastname": ...
},
Seems like this is the way to go.
EDIT: I have also heard about the way how to convert JSON to vCard so it could be possibly imported to Monica. However, I don't think that vCard can carry on information like the link to the Facebook profile.
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We could do a similar thing with messages