I am trying to add youtube video downloader for firefox having problem doing so

Question

I had uploaded few videos about my website project www.finditdubai.com which i want to download from youtube as once i uploaded i had deeted the video files from my computer. When i am trying to add your tube downloader from mozilla extentions mozilla page is not displaying any extentions there its just a simple white page with text links is it because of some internet issues or there is some problem with mozilla extantion page??? P;ease check https://addons.mozilla.org/en-US/firefox/addon/youtube-video-and-audio-dow/

Answer 1

It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the extensions.* files (e.g. extensions.json, extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
*https://support.mozilla.org/kb/Profiles
New files will be created when required.
See "Corrupt extension files":
*http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
*https://support.mozilla.org/kb/Unable+to+install+add-ons
If you see disabled or not compatible extensions in "Firefox/Tools > Add-ons > Extensions" then click the Tools button at the left end of the Search Bar to check if there is a compatibility update available.
If this hasn't helped then also delete the addons.json and addons.sqlite files.