Using Firefox, how do I block side pop out ads/links?

Question

When using Firefox I continue to get these left hand pop-out strips for links to Facebook, Email, Twitter, Reddit, Stumblupon and more. This strip of links covers the text on the page making it impossible to read any article.
How do I get rid of it? I've installed AdBlock, AdPlus, NoScript and still can't get rid of the thing. Here's a picture:

Answer 1

''cor-el [[#answer-688243|said]]''
<blockquote>
I only get the overlap if I zoom the page using full page zoom.
I some cases "Zoom Text Only" causes issues and full page zoom causes issues, but in this case the opposite happens.
You can hide that bar with this code in userContent.css or Stylish
<pre><nowiki>@-moz-document domain(www.towleroad.com){
#at4-share { display: none !important; }
}</nowiki></pre>
</blockquote>
Yes but I would have to do that with each page I view. I want a resolution to remove that option permanently.
Please understand, my browser(s) appear on a five-foot display (two-30" Cinema displays) and because of poor eyesight (which can't be corrected with glasses or surgery) I must Zoom the page to a readable size. But that is hampered now by this ridiculous left side link pop-out. A pop-out that is there for the convenience of the website to help promote their business through social media.
I DO HAVE the option to ban this side pop-out using Safari - so why can't the Firefox people offer the same option? I dropped Firefox years ago and returned just a few months back hoping the problems with Firefox had been corrected. They haven't yet day after day we keep getting new upgrades disabling our addons until those developers can catch up.
I like Firefox but I now like Safari much better. I can search for anything directly in the url bar and not in a separate search box. I am removing Firefox from my systems.