I want this site https://secure2.ecfmg.org/emain.asp?app=csess to remain open for several hours of the day so i can use check 4 change software on that site to schedule the date of my exam ,but that site gets logout automatically within 5 minutes. As i asked many other peoples its not causing problem with them but i am facing that kind of problem.please help me regarding this issue as soon as possible. thanks

Many site issues can be caused by corrupt cookies or cache.

• Clear the Cache and

• Remove Cookies
  Warning ! ! This will log you out of sites you're logged in to.

Type about:preferences<Enter> in the address bar.

• Cookies; Select Privacy. Under History, select Firefox will Use Custom Settings. Press the button on the right side called Show Cookies. Use the search bar to look for the site. Note; There may be more than one entry. Remove All of them.
• Cache; Select Advanced > Network. Across from Cached Web Content, Press Clear Now.

If there is still a problem, Start Firefox in Safe Mode {web link} While you are in safe mode;

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Poke around safe web sites. Are there any problems?

Then restart.

Remove History For One Site Open the History Manager <Control><Shift> H. In the search bar, enter the name of the site. Right click on one of the listings and select Forget About This Site. This should remove all information, including any passwords / settings.

I have tried those methods , but it is still not working ..

Menu > adds-ons > extension > check4change > enabled should i disable this one? i dont know after that check4change software will work or not

Not a bad idea.

Did you try Firefox in Safe Mode yet?

yes i have tried firefox safe mode

I've called the big guys to help you. Good luck.

even i am not able to use check 4 change (new version) on firefox on android (samsung) :(

"its showing that check4change couldnt be intalled because it is not compatible with 39.0 version on android"

It is working for me in desktop, however I would also recommend getting in contact with the developer.

yes i have found myself solution of that problem,if anybody face that kind of problem then pls folow this setting:

firefox > menu (jst click on 3bars on the right uper bar ) >  options  >  content  >  pop-ups 
(box below that might be marked so unmark that one box)  >  then restart the firefox  >  try again for      check4change .

best of luck, bye

That was very good work. Well Done.