This tweak will only work on adblock and you can apply similar technique on other ad-block softwares/plugins. In your firefox, go to adblock > preferences and click on “Add Filter”.
Red popup which appears at the bottom right corner of the website ( has id set to “topbar”. To add a div in the blocklist, you only need to add ###idName to the filter list.
Enter “###topbar” without the quotes in the filter and AdBlock will block every element that has ID=topbar.
Note: Applying this filter may also affect other websites so look for applied AdBlock rule on other website.