Add Desktopify to Chrome
Step 1: Visit the following link: Click Here
Step 2: Click "Add to Chrome" to Setup Desktopify into your Chrome browser
Step 3: Once the extension has been added, click over the extension icon () which can be found in the search bar section. Click over it, and scroll until you find Desktopify icon, then pin it as shown in the animated graphic below.
Step 5: Instagram login page will appear as below
Step 6: In the login page, Enter Instagram login details
Step 7: After login, into Instagram click over Not Now
Step 8: the Instagram home page will appear as follows
How to post using Desktop
Step 2: Choose the file or folder you want to upload.
Step 3: "New Photo Post" page will appear, from this page Click "Next"
Step 4: Type the caption which you would like to appears beneath your post.
Step 5: After the caption has been written, click on "Share".