Photoshop Portable - Another instance already open

Delete:

PhotoshopCSPortable.ini

found in:

..\Photoshop CS Portable\Data\

How to disable the new "Website is now in fullscreen" message in Firefox

To stop  the new "Website is now in fullscreen" message in Firefox, do the following:

1. Open to about:config in your Firefox
2. Search for full-screen-api.warning.timeout
3. Modify value from 3000 to 0 (zero)

EDIT: Beware that this feature has been put in place to protect you from phishing attacks that mimic Firefox's menu and UI as /u/Syl0x points out 

You can also try using "Disable HTML5 Fullscreen Alert" Firefox Addon found here.

Change the Network number - Windows 7

1. Right click connection icon in Taskbar notification area
2. Choose Open Network and Sharing Center.
3. Clicking on the house icon