You can watch the video below, but following these 3 steps below are real easy. Make sure you use Google Chrome though.
- First off, sign into your Instagram account from your computer and then engage the developer mode on Google Chrome by pressing Ctrl + Shift + I.
- Next, engage Chrome's mobile mode by either pressing Ctrl + Shift + M or clicking the small icon in the top right corner.
- Finally, just hit the refresh button on your browser and you'll be given the option to post to your profile directly from Chrome.
You won't be able to access features like filters and multi-image posts, but it's another way to make a post from work maybe :)