I run Firefox with Javascript selectively enabled thanks to the uMatrix AddOn. Some sites need some adjustments or really want Javascript, but instead of enabling Javascript for these sites, I often rewrite the URLs automatically, using the Redirector AddOn. These are my redirects:

Use old.reddit.com instead of www.reddit.com

Even though I don't really frequent Reddit.com, for some communities or problems, it is a good source of information. This entry rewrites all URLs that point to www.reddit.com to old.reddit.com, which doesn't need Javascript and loads all content at once:

 Redirect:

    https://www.reddit.com/(comments|r)/(.*)

  to:

    https://old.reddit.com/$1/$2

Redirector snippet export

    {
        "description": "Use old reddit comments",
        "exampleUrl": "https://www.reddit.com/comments/o9xp15",
        "exampleResult": "https://old.reddit.com/comments/o9xp15",
        "error": null,
        "includePattern": "https://www.reddit.com/(comments|r)/(.*)",
        "excludePattern": "",
        "patternDesc": "",
        "redirectUrl": "https://old.reddit.com/$1/$2",
        "patternType": "R",
        "processMatches": "noProcessing",
        "disabled": false,
        "grouped": false,
        "appliesTo": [
            "main_frame"
        ]
    },

Youtube fullscreen, without comments

Instead of seeing the horror that is YouTube consent popups and YouTube viewer comments, I run the YouTube videos completely filling the browser window by going to the /embed/ link that allows one to embed a YouTube video in another webpage.

Redirect:

  https://www.youtube.com/watch\?(?:feature=youtu\.be&)?v=([-\w]+)&(list=[-\w]+)
to:

  https://www.youtube.com/embed/?listType=playlist&$2

Redirector snippet export

    {
        "description": "Youtube Embed Playlist / Fullscreen only",
        "exampleUrl": "https://www.youtube.com/watch?v=PgWCLuQuajo&list=OLAK5uy_nKPBfR_eEc8qYWnkE3j7ijH23L_ULyiZY",
        "exampleResult": "https://www.youtube.com/embed/?listType=playlist&list=OLAK5uy_nKPBfR_eEc8qYWnkE3j7ijH23L_ULyiZY",
        "error": null,
        "includePattern": "https://www.youtube.com/watch\\?(?:feature=youtu\\.be&)?v=([-\\w]+)&(list=[-\\w]+)",
        "excludePattern": "",
        "patternDesc": "",
        "redirectUrl": "https://www.youtube.com/embed/?listType=playlist&$2",
        "patternType": "R",
        "processMatches": "noProcessing",
        "disabled": false,
        "grouped": false,
        "appliesTo": [
            "main_frame"
        ]
    },
    {
        "description": "Youtube-NoCookie Embed / Fullscreen only",
        "exampleUrl": "https://www.youtube-nocookie.com/watch?v=Wisthc226SU",
        "exampleResult": "https://www.youtube.com/embed/Wisthc226SU",
        "error": null,
        "includePattern": "https://(?:www|m).youtube(?:-nocookie)?.com/watch\\?(?:feature=youtu\\.be&)?v=([-\\w]+)",
        "excludePattern": "",
        "patternDesc": "",
        "redirectUrl": "https://www.youtube.com/embed/$1",
        "patternType": "R",
        "processMatches": "noProcessing",
        "disabled": false,
        "grouped": false,
        "appliesTo": [
            "main_frame"
        ]
    },

Use Nitter instance instead of Twitter

From time to time some supposedly interesting information only exists as a 140 character entry on Twitter. Twitter really wants Javascript but there are mirror sites running the Nitter software. This rewrites Twitter URLs to use one (of many) Nitter instances:

Redirect:

 https://(mobile.)?twitter.com/(.+)

to:

 https://nitter.namazso.eu/$2

Redirector snippet export

    {
        "description": "Twitter to Nitter (nitter.pussthecat.org)",
        "exampleUrl": "https://mobile.twitter.com/richardf/status/1314481244344852480?s=20",
        "exampleResult": "https://nitter.namazso.eu/richardf/status/1314481244344852480?s=20",
        "error": null,
        "includePattern": "https://(mobile.)?twitter.com/(.+)",
        "excludePattern": "",
        "patternDesc": "",
        "redirectUrl": "https://nitter.namazso.eu/$2",
        "patternType": "R",
        "processMatches": "noProcessing",
        "disabled": false,
        "grouped": false,
        "appliesTo": [
            "main_frame"
        ]
    }