Delete any "MyWebSeach" extensions under menu TOOLS and then ADD-ONS and EXTENSIONS.
Next, in the address bar, type "about:config" without the quotation marks.
You will see a warning about voiding your warranty. Click "I'll be careful, I promise!" and move on.
In the filter bar, type "myweb."
Right click any items that have "mywebseach" in them and select the "reset" option.
I do not know much about MyWebSearch except that it block pages that have anything to do with "Removing Mywebsearch." If it is blocking those pages, it can block other information as well. Jerks.