Picsee browser extension can be installed in two ways, one is to install from Chrome Web Store, the other is to download package and install offline......
Click on Chrome Web Store extension home page (opens new window), open the page, then click Add to Chrome and wait for installation to complete.
If you can not access Chrome Web Store, you can download package here, and install offline.
Select offline package which version you want.
Click it to download zip file and unzip.
Open Chrome, click Customize and control Google Chrome, which is on the top-right menu bar, then look for More Tools in the contextual menu, find the Extensions in the More Tools submenu and click it.
On the top-right corner of the page opened, look for Developer mode, enable.
click Load unpacked
On the opened dialog, locate the folder which download and unzip before, then click select, finish to install.
On the top-right corner of Chrome, look for Extension, click it, find Picsee in the opened contextual menu, click Pin.