Fóram Tacaíochta Firefox

In general, when downloading, authorizing on some sites, I have this problem - "Invalid redirect on page". Moreover, this error occurs only on the firefox engine, but not on chromium. I am writing from a browser Comodo IceDragon. The screenshot that I attached is in Russian.

First, I have no idea what I am doing re any sophisticated knowledge re Firefox or any other browser. So, please bear with me re how to understand my question.

I have no idea what I did, but after getting the latest Firefox, I cannot access Reddit. Let me explain: I was able to click on each topic/post freely on Reddit. Now when I visit Reddit, the topics/posts are stagnant and when I click on a topic/post, it goes to another page and I have to click on the URL to read the post. Also, if there are multiple pages on a post, the only page I can see is the first, I cannot click through to view anything additional.

It seems that Firefox is blocking Reddit. I hope this explains this issue.

Also, I cannot find the "settings" for Firefox now... to allow unlimited scroll and to automatically go to a new page.

Have set duckduckgo as default search engine but search just returns duckduckgo main page, not keyword search results when keywords are typed in search bar and hit search. If I revert to bing it shows results as usual. Change back to duckduck and it reverts to just showing duckduck main page again. Any suggestions