This neat browser extension was made to improve legal research in CanLII.  It adds a table of contents based on headers, and works particularly well with SCC decisions.  It is available for Chrome (and Chrome variants like Brave), Edge, and Firefox browsers.

The extension is the work of two people - Peter Wills and Peter Goshulak.  It costs $10 per year, which is a very modest fee that supports an independent project that helps the Canadian legal community.  The extension identifies judgments and reveals headings within the decision (most SCC, FCA, ONCA, BCCA, and ABCA cases), as well as formats all cases on CanLII.  

I have been using it for over a year and find it useful enough to recommend.  You can find more information on their website (https://courtingtrouble.ca/iDissent/ ).  You can also search for the extension/addon using your favourite browser's web store or addon repository.