Make sure that you do not zoom the pages as that will have effect on the screen dimensions as reported via JavaScript.

Reset the page zoom on pages that cause problems.

• View > Zoom > Reset (Ctrl+0 (zero); Command+0 on Mac)

• http://kb.mozillazine.org/Zoom_text_of_web_pages

Did you check the Web Console and the Browser Console for more details to see if you can identify this problem?

• https://developer.mozilla.org/Tools/Web_Console
• https://developer.mozilla.org/Browser_Console

Did you try Safe Mode to see if this is caused by an extensions?

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

zoom its okay << I did not change it and here some pic from my blog’s/website’s

Note that some elements of the HTML does not show to the public ( to my and to other)

look at pic no 25,26 and here the problem and that’s take more size of page?

Seems to be looking fine here.

What elements are missing in particular?

If you use extensions (Firefox/Tools > Add-ons > Extensions) that can block content (e.g. Adblock Plus, NoScript, Flash Block, Ghostery) then make sure that such extensions aren't blocking content.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

• Do NOT click the Reset button on the Safe Mode start window.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Still a problem, a lot of elements are missing..........I do not use theme/Adblock or any such tools, and I always do not have any additional extensions except for RealPlayer and HotShield. And the use of Firefox in Safe Mode does not help anything to get a solution

I'm not sure if HotShield isn't able to block some content or otherwise could be causing this issue.

You could try to check the Net log in the Web Console (Firefox/Tools > Web Developer; Ctrl+Shift+K) and possibly the Browser Console for errors.

• https://developer.mozilla.org/Tools/Web_Console
• https://developer.mozilla.org/Browser_Console

Can you access or view the page via Google Translate and HotShield disabled?

(use a random source language and the current language as destination language to prevent Google from translating)

Can you access or view the page via Google Translate and HotShield disabled?

some time yes and some time no )

(use a random source language and the current language as destination language to prevent Google from translating)

and now what i can do?

The usual way to proceed if content is missing or otherwise looks corrupted is to reload web page(s) (F5) and bypass the cache (Ctrl+F5) to refresh possibly outdated or corrupted files.

• Hold down the Shift key and left-click the Reload button
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Command + Shift + R" (Mac)

Did you try to check the Net log in the Web Console?
(you need to reload the page to generate this log)

I do not know how to use Web Console ! This is a long article in the link you provided! So any other ways?