You should use HTTP GET/POST requests cubes and make requests with the parameters described in 2captcha API to solve this kind of captcha.
Check the example:
To run more threads, you should optimize your project.
First of all, disable unnecessary content loading on webpages, such as images, animation, media, etc..
If you work with large data, you should optimize the way processing it.
ZennoDroid works with apps, not browser as zennoposter. So cookies are not stored in a profile in ZD.
Try using this code to get cookies:
var cookie = droid.App.GetCookie("com.android.chrome");
return cookie;
There is nothing special here.
You should run instance with profile-folder and install browser extension, it will be saved in the profile.
Next time when you need the extension, just run instance with that profile-folder again
Please check my screenshot. There is a small button to stick the window and display it permanently or hide it.
Make panels reset and press this button.
I told you about auto-hide option. Why you didn't give attention to it?
Press it to make variable window visible permanently.
Also, switch Interface mode to Standard in Window menu..
There is probably something wrong with internect connecton to our service from your PC, try disabling antivirus/firewall and other protection programs. And also unload the programs which consume large network traffic.
You should edit ProjectMaker.exe.config file from Progs folder in program directory and change all entries userarea.zennolab.com (or userarea-us.zennolab.com) to userarea.zenno.io in them.
The files can be edited in Notepad or any other text editor.
Language of the extension depends on your browser.
The extension example provided on that pages describes how to integrate it into ZennoPoster. Have you read it?