update
There is a problem to browse some sites (using java and jqueri) after updating the browser. Update version 5.0.1, System Windows 7 ultimate x64
Alla svar (1)
-> Tap ALT key or press F10 to show the Menu Bar
-> go to Help Menu -> select "Restart with Add-ons Disabled"
Firefox will close then it will open up with just basic Firefox. Now do this:
-> Update ALL your Firefox Plug-ins https://www.mozilla.com/en-US/plugincheck/
-> go to View Menu -> Zoom -> click "Reset"
-> go to View Menu -> Page Style -> select "Basic Page Style"
-> go to View Menu -> Toolbars -> select Menu Bar and Navigation ToolBar -> unselect All Unwanted toolbars
-> go Tools Menu -> Clear Recent History -> Time range to clear: select EVERYTHING -> click Details (small arrow) button -> place Checkmarks on Cookies & Cache -> click "Clear Now"
-> go to Tools Menu -> Options -> Content -> place Checkmarks on:
1) Block Pop-up windows
2) Load images automatically
3) Enable JavaScript
-> go to Tools Menu -> Options -> Privacy -> History section -> Firefox will: select "Use custom settings for history" -> Remove Checkmark from "Permanent Private Browsing mode" -> place CHECKMARKS on:
1) Remember my Browsing History
2) Remember Download History
3) Remember Search History
4) Accept Cookies from sites -> select "Exceptions..." button -> Click "Remove All Sites" at the bottom of "Exception - Cookies" window
4a) Accept Third-party Cookies -> under "Keep Until" select "They Expire"
-> REMOVE CHECKMARK from CLEAR HISTORY WHEN FIREFOX CLOSES
-> go to Tools Menu -> Options -> Security -> place Checkmarks on:
1) Warn me when sites try to install add-ons
2) Block reported attack sites
3) Block reported web forgeries
4) Remember Passwords for sites
-> Click OK on Options window
-> click the Favicon (small drop down menu icon) on Firefox SearchBar (its position is on the Right side of the Address Bar) -> click "Manage Search Engines" -> select all Unwanted Search Engines and click Remove -> click OK
-> go to Tools Menu -> Add-ons -> Extensions section -> REMOVE All Unwanted/Suspicious Extensions (Add-ons) -> Restart Firefox
You can enable your Known & Trustworthy Add-ons later. Check and tell if its working.