Head over to the firefox addons store and install the Medium-Unlimited addon.
Google Chrome Browser
Follow the below steps to add the extension to your Google Chrome browser:
Open the Extension Manager by following:
Kebab menu(⋮) -> More Tools -> Extensions
If the developer mode is not turned on, turn it on by clicking the toggle in the top right corner
Download the extension file from here.
Extract the downloaded .zip file and note the extracted path
Now click on Load unpacked button on the top left and select the extracted folder
You are all-set now, head over to medium.com and enjoy the articles!
Please get in touch if you need any help in installing the extension: firstname.lastname@example.org