How to automate the process of filling out the same type of forms on several sites at the same time?

Question

Automation

How to speed up the process of filling out forms on several sites at once (the information for filling out forms is (almost) the same)
Basically, I need this for one thematic sites
For example, there are 10-20 sites similar to Toster.ru and not to run separately on each site and typing ctrl + v immediately displayed on all sites what I type or inserted into the text area of ​​the first ...
They usually have 1-3 forms to fill out
1) Main form Brief description of the question or question title (available to all)
2) Additional form detailed description of the question
3) Tags
And now I'm registered on more than 30-60 sites ...
And I need to fill out a text form on all these sites as soon as possible.
In the usual way through a regular browser - for a long time. The old-fashioned way: Yes, I can open all these sites at once in advance and after switching between them with a combination (ctrl + Tab) and copy the text (ctrl + c) paste it (crtl + v), but a) the forms are arranged in a pair in different ways and you get to them either immediately or exclusively by pointing at them, and in general the idea is dreary ...
But I have some text and this text must be inserted into all these text forms on sites, how can such an activity be accelerated ?!
Maybe there are some plugins / add-ons, programs, browsers, or something else ...
I’ll say in advance that I wouldn’t want to poke manually, or at least less ... So the idea of ​​\u200b\u200bdividing the display (which is already so small) into 6\4\ 2 parts does not fit this again, too, poking ...
... the form is the same as here, we fill it with text and every time you need to click on the "Ask a question" button (here), and on those sites there are also 1-3 forms and the button name is just different ...
Thanks in advance for the answers and Sorry for the vague description...

Answer 1

I don't know how much this can help you, but if you have a Mac, then 1Password Manager has a browser autofill feature for passwords.
Here it is explained what's what: macosworld.ru/1password-tips-and-tricks

Smart bookmarks and automatic login
How do you login to your sites? The fastest way is in the usual way:
open the desired resource
, click on the 1Password icon, select
the entry to fill in the login and password
entering a password). That is, all these three points are combined into one action.