I usually use the mobile versions of different websites at the Firefox sidebar, for example Twitter, Facebook, Telegram, WhatsApp. It’s very useful to check them and chat while you are watching a website. But when I’m often chatting with English and Spanish people, I need to change the spell-checker dictionary every time.
I use Firefox Quantum ESR 60.6.1esr (64-bit)
In Linux Mint Cinnamon 17.3 64-bit
In the ESR Firefox version you can load bookmarks on sidebar checking the option on the bookmarks properties. In your version I suppose it should be using the Open In Sidebar add-on Open in Sidebar – Consigue esta extensión para 🦊 Firefox (es) that people that want to continue using sidebar for browsing without installing the ESR version is using.
I can reproduce the issue, but our developer can’t. As this is a very specific problem and not many users have asked for this, I’m not sure we can spend more time fixing it.
Well, like I said there are lots of Firefox addons to load mobile websites at the sidebar. I’m the first one to ask for this fix so LT can solve it before anyone else asks for it