Model Releases are pretty much only useful as a record that a shoot actually took place, where, when, for how much, who was present and that no coercion was involved regarding shooting levels (in the case of nudity being involved). A Usage Agreement on the other hand - which is an entirely separate document and the wording of which should never form part of your Model Release paperwork - is an entirely different thing. It governs who can use the images, where, when, for how long and how any financial compensation is to be allocated.
And since legislation differs from country to country, there's no 'one size fits all' when it comes to either document.
I had to get mine drawn up, translated and notarised by lawyers in three different countries when I was working with models, at no small expense. Unless you're working commercially, it's often better to do without them entirely. If a person agrees to be photographed by a photographer - in a studio or on location - they can't really claim they didn't know what was going on and object to seeing the images online at some future date. This has been tested in court, both in the US and EU. I myself have tested this here in Germany - a model's parents objected to seeing her images appearing on a Model/Photography site and she subsequently contacted first me, then the site owners, demanding they be removed. Even without a release, I'm not obliged to do so since I have the email chain where she agreed to the shooting and the levels involved.
Regarding 'street photography' of strangers, in general terms, there's no expectation of privacy in public places, so you're fine for non-commercial work - sharing on social media doesn't count as 'publishing' in the accepted sense, in than no financial transaction takes place. France has slightly different laws regarding 'privacy' - you can shoot someone walking in the street without permission, but not sitting at a street cafe for example, so it's often better to simply ask. If asking beforehand risks spoiling the spontaneity of the image, ask afterwards. It's really not difficult.