gistfile1.js

plugins.options["follow-link.targets"] = 'a[href], input:not([type="hidden"]), button';
plugins.options["follow-link.nextpattern"] = "^次へ|進む|^次.*|続|→|\\bnext|>>|≫";
plugins.options["follow-link.prevpattern"] = "\\bback|戻る|^前.*|←|\\bprev|<<|≪";

function findPattern(doc, pattern) {
    let target = plugins.options["follow-link.targets"];
    let regex = RegExp(pattern);
    let result = doc.querySelectorAll(target);
    for (let i=result.length-1;i>=0;--i) {
        let elem = result[i];
        if (regex.test(elem.textContent) || regex.test(elem.value)) {
            return elem;
        }
    }
    return false;
}
function findRel(doc, rel) {
    for each(let query in ['a[rel~="%s"]', 'link[rel~="%s"]']) {
      let link = doc.querySelector(util.format(query, rel));
      if (link)
        return link;
    }
    return false;
}
function followLink(doc, rel, pattern) {
    let link = findRel(doc, rel) || findPattern(doc, pattern);
    if (link);
        plugins.hok.followLink(link, plugins.hok.CURRENT_TAB)
}

ext.add("follow-next-link", function () { followLink(content.document, "next", plugins.options["follow-link.nextpattern"]); }, "follow next link");
ext.add("follow-prev-link", function () { followLink(content.document, "prev", plugins.options["follow-link.prevpattern"]); }, "follow previous link");