Need to remove add-ons. Instructions not clear and cannot find add-ons in the menu button. Urgent help please!

explained in question

hello leothedc, you can also access the addons manager by typing '''about:addons''' into the address bar.
[[Disable or remove Add-ons]]

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    Question posted in Stack Overflow too: java - How to solve "The certificate is not valid and cannot be used to verify the identity of this website" error? - St…
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