ffs is widely used! mohaha!
no but i use swedish acronyms like
iaf = anyways
iofs = approx. in another view
if you only use acronyms you may be recognized as a bit immature, trying to brag about himself as a geek
Please don't use these in real life as they will not be useful or professional in businesses. You will lose your job if you try any of these. They are only good for note taking (and I believe no one talks about their note taking) or casual chatting on a keyboard.
I remember someone did an interview for a job and the person used a couple acronyms to describe the job, the poor kid didn't know what to say and the interviewer got in trouble for that.