Wiki: Expensive mode is not saved

[Accrettio]

I'm playing my first game with expensive mode set. While doing that I found a small issue with the wiki, the setting to use expensive mode is not saved. Let me show with an example.

1. I go to look at fast transport belts: https://wiki.factorio.com/Fast_transport_belt
2. Since I want to use the expensive mode I click that button, and I get this page: https://wiki.factorio.com/Fast_transpor ... ive%20mode
3. I want to know what it takes to build the transport belt, and click the picture in the "Recipe" section

What is currently happening at #3 is that I get to the transport belt page with normal mode. I think that's wrong, it should always use the same mode I'm currently using. In this case I should get to the expensive mode page.

Other information that might be important:
- I use firefox 59.0.1 on a Windows 10 computer
- I'm not logged in to the wiki

[Bilka]

This is not supported by the extension that we use to make the tabs, sorry.