It looks like you're trying to connect to an ESPCRM server.
ESPCRM is designed to work in Google Chrome only.
All the major browsers are all excellent pieces of work but they have small differences.
In addition, Google Chrome has a few features not found in other browsers that are needed by ESPCRM.
Use this link https://www.google.co.uk/chrome/ to install Google Chrome.
Other Requirements
You will need your user name and paassword to connect.
The person in charge of your ESPCRM system will be able to give you these.
If you intend to use the ESPCRM mailmerge features and /or the ESPCRM Presentation Manager
you'll need Microsoft Office or Apache Open Office installed on your PC.