Hi community,
on the Mozilla Add-on page i.e. (https://addons.mozilla.org/en-US/firefox/addon/easy-youtube-video-download/?src=external-dlwebpage) there is no button to dl/install add-on. Firefox is updated to the newest version. I only can dl Firefox itself or add add-on to a collection.
Whats wrong?
Thx for your help
You should see a blue (in english labeled as) “Add to Firefox” button in the top left box. It should be placed below the “Featured Extension” label and right besides the short description.
Don’t have that box 
That’s why I’m asking whats wrong.
Do you have any anonymization or browser imitation tools enabled (resist fingerprinting, user agent switchers etc.)
problem solved. I had to switch to the “desktop” view of FF, after that the button d/l appeared. Don’t know why maybe cause of Win10.
Thanks for your help.
What do you mean by “desktop view”?
On the bottom of the add-on page of Mozilla is a link to the desktop site. After changing to this version I had the d/l link. Hope this helps others with same problem
Re-reading your initial post (“I can only download Firefox itself”), it sounds like there’s something in your profile that is making AMO think that you’re not using Firefox. For Chrome and other browsers, we show a button to download Firefox instead of the normal install button. Hence the last question you were asked by Martin.
Going to the old site will only help you work around the problem temporarily, since that site will be shut down later this year.
Seems to be some more riddles with my FF. I am using FF for several years now and never delete it. I upload the window FF shows me if I click on “help”
If I click on that mentioned button “dl FF” it said on the next page that I’m using the most actual version of FF. Maybe its a Win10 spring update problem?
The newer version of the site (non-Classic) doesn’t like there to be any additional words after the
Firefox/60.0
in the user agent string. Could that be the issue?
You can view your standard user agent string by checking the request headers in the Network Monitor or consoles of the developer tools. or by using various sites such as mine here (it will appear in red):
https://www.jeffersonscher.com/res/jstest.php
If you have unexpected modifications to the user agent string, you usually can reset it using the steps in this article:
https://support.mozilla.org/kb/how-reset-default-user-agent-firefox
