Do you mean a web browser?
Answer
Just click on the icon of the web browser you want to open. Such as Google Chrome, just click on the Google Chrome icon.
Yes, you can open multiple web browsers on Android. You can also open multiple tabs in a single browser.
HTML Attachments can be opened via browsers. These attachments can be easily opened via most of the browsers.
One of your browers is specified preferred in its preferences, that one will always open first. You need an icon for your others on your desktop. You click on them and they will open also. There is no limit to the number of browsers that can be open at once. I regularly use four. if you have the two browsers on your desktop, click and drag over them and click enter!
You can open 2 browsers at the same time, but in order to display both you'll either need 2 screens, or you'll need to minimise both at the same time.
go to file and hit new page
Try closing all your open browsers.
get a new computer maybe your computer is not maid for it
Maybe open 2 different browsers...
By right clicking on the selected link and clicking on "open in new window" or "open in background"
Mozilla Firefox, Flock, Galeon, Google Chrome, SRWare Iron are open source internet browsers.
Almost all browsers provide this facility these days. Internet Explorer, Google Chrome, Mozilla Firefox, Safari etc all provide this.
It depends on what device your are using and which browser you are running. Most desktop browsers allow you to open multiple pages by using a Tab system. On Windows browsers, there's a convention of using Ctrl+T to create new tabs.