Bypass Paywalls Clean - https://gitflic.ru/project/magnolia1234/bypass-paywalls-chrome-clean
To access articles.

SingleFile - https://addons.mozilla.org/en-US/firefox/addon/single-file/
Instant snapshot of a page.

Stylus - https://addons.mozilla.org/en-US/firefox/addon/styl-us/
To modify CSS (font size etc.)

body{
    font-size: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

uBlock Origin - https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/
No ads.

Unhook - https://addons.mozilla.org/en-US/firefox/addon/youtube-recommended-videos/
No Shorts.

Yesterday for Old Reddit - https://addons.mozilla.org/en-US/firefox/addon/yesterday-for-old-reddit/
Old Reddit, for desktop and phone.