I have install an add-on for Firefox, but it does not appear in my list of Add-ons Manager, and after I restarted Firefox, it went.

I try to install 1-Click Youtube Video dDownloader, which is supposed to add a download button to Yuotube video pages. I go here:

https://addons.Mozilla.org/en-us/Firefox/addon/1-click-YouTube-video-download/

and I click 'add to Firefox '. It gives me the window "install now". I click on 'Install now' and it is said that Firefox has to restart and it will be installed when Firefox opens again. If I click "Restart now" and restart Firefox. Then I go on Youtube, but no button. I check the page of the Add-ons Manager, and I see that it is installed in the extensions. So, if I go to the page and click 'Add to Firefox' once again and restart once again, go to Youtube, the download button IS there, and it works perfectly. But if I exit and restart Firefox, the download button is once again absent, but the extension is always installed. Why this extension works only when I restart twice, and then it disappears again?

When the button does not appear, but the extension is marked as active, try to reload the page to Youtube without using the cache by pressing command + shift + r to see if that triggers the extension to insert the button.

If it remains inconsistent, I would like to ask the developer to Add on to their Contact page: http://www.clickvideodownload.com/contact.php

Tags: Firefox

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