If you're looking for something quick and dirty to filter jobs or get statistics, this is what I paste in browser console:
    function hideAllExcept(searchRegex) {
        var allComments = Array.from(document.querySelectorAll('.comment-tree .comtr'))
            .map(function(e){e.style.display='none';return e});
        var topLevelComments = allComments.filter(e= e.querySelector('img[width="0"]'));
        var matchedComments = topLevelComments.filter(e= 
            (e.style.display = searchRegex.test(e.querySelector('.comment').innerText) ? 'table-row' : 'none')=='table-row');
        console.log('Showing '+matchedComments.length+' out of '+topLevelComments.length+' jobs for '+searchRegex);
    }
    // Examples. The last one to execute determines what posts are shown.
    hideAllExcept(/\b(Rust)\b/i);
    hideAllExcept(/\b(Java)\b/i);
    hideAllExcept(/\b(Scala)\b/i);
    hideAllExcept(/\b(Kotlin)\b/i);
    hideAllExcept(/\b(Swift)\b/i);
    hideAllExcept(/\b(Ruby)\b/i);
    hideAllExcept(/\b(Python)\b/i);
    hideAllExcept(/\b(PHP|PHP5|PHP7)\b/i);
    hideAllExcept(/\b(JS|JavaScript)\b/i);
    hideAllExcept(/\b(React|ReactJS)\b/i);
    hideAllExcept(/\b(Angular|Angular5|Angular6)\b/i);
    hideAllExcept(/\b(Vue|VueJS)\b/i);
    hideAllExcept(/\b(Node|NodeJS)\b/i);
    hideAllExcept(/\b(Go|GO|Golang|golang|GOLANG)\b/);
    hideAllExcept(/C#/i);
    hideAllExcept(/\bC\b|C\+\+/i);
    hideAllExcept(/\bHaskell\b/i);
    hideAllExcept(/\bErlang\b/i);
    // Remember to also search other pages. Sorry if I missed some stacks in the examples.