you say "little blue bar" -- are you referring to the STOCK browser?
if so, have you used any other browser?
what carrier are you on and are you rooted?
when did this start to occur? did you remove any apps? add any apps?
are you low on storage memory? have you went into the storage tab and used the "free up more space" feature to remove unnecessary files and free up storage space?
do you have any error messages?