
RESOLVED: thank you everybody for your kind answers. (Don't know if I explained it clearly.so please ask me if you want to know more about the question.) Have a look at the Resource Monitor, how much FF keeps writing to the disk. Its seeming the div height would have to be set to fit contents,but I don't know how else can I do that.if I don't use height then background-color can't be set.please tell me how can I fit the contents to the div as well as the background color would be red. Using a combination of every possible config option regarding to RAM/disk caching do not cut it in the current version, most of the data written still ends up to the disk as the worst culprits are the session storage and various. but on mozilla firefox the height of the div not increasing when the content crosses min-height limit. Next, navigate to the Privacy & Security page, scroll down to Cached Web Content, and select the Clear Now box.

Setup menus may not display properly, or you may not be able to.

Launch Firefox and navigate to the menu icon (top-right corner), then select Options. Once the offending extension has been isolated, contact the help team for this extension. I created a div tag with min-height and gave background color 'red'. Here’s a brief tutorial to deleting the cache and cookies in Firefox to resolve unresponsive periods: 1.
