Setting up browser

• Download and install Chrome / Firefox browser.

• Go to Extensions tab as it showed on screenshot.

Find extensions tab

• Once u've opened it enable developer mode (step 4).

• Unzip your extension archive and just click load unpacked and select your folder with all extension files. To load it correctly you should use folder which directly contains manifest.json file, so it WON'T be like folder (unpacked archive name) - folder (which actually contains files) - manifest and other files

Enable developer mode and loading extension