{"id":172,"date":"2014-04-17T15:27:49","date_gmt":"2014-04-17T13:27:49","guid":{"rendered":"http:\/\/www.gijsk.com\/blog\/?p=172"},"modified":"2014-04-17T15:27:49","modified_gmt":"2014-04-17T13:27:49","slug":"why-doing-visual-refreshes-of-firefox-is-hard","status":"publish","type":"post","link":"https:\/\/www.gijsk.com\/blog\/2014\/04\/why-doing-visual-refreshes-of-firefox-is-hard\/","title":{"rendered":"Why doing visual refreshes of Firefox is hard"},"content":{"rendered":"

We’re getting closer and closer to releasing Australis with Firefox 29, and that gives me more time to write something that’s been on my mind the last couple of weeks\/months. Extra impetus was provided by sentiment along the lines of “how did you possibly miss this \/ think fix X was a good idea?” from some people outside the core development team, responding to some of our changes.<\/p>\n

In this post, I’d like to give you an idea of the number of combinations of options, configurations, themes, add-ons, fonts and styles. It is enormous<\/strong>. Firefox generally tries to fit in with your operating system as best it can, and that means we have to pay attention to lots of things. And yes, that means sometimes we miss things. Here’s a breakdown of some of the things I’ve seen fly by as we made Australis, all linked to bugs specific to particular scenarios (there are 54 individual bugs linked, the majority of which were fixed for 29).<\/p>\n

Firefox is available on three main (tier-1) platforms: Windows, Linux, and OS X.<\/p>\n

All three platforms support lightweight themes, of which we support light and dark text variants. On light text lightweight themes, we invert the text and icons to be bright (which usually means the theme itself has a dark background). Interactions between these themes and the OS are not always the same everywhere, which leads to bugs<\/a>.<\/p>\n

Different toolbars like the menubar and the bookmarks toolbar can be toggled on and off (which sometimes makes certain ideas more difficult<\/a>), and the menubar has an autohide state<\/a>, which is new on Linux and caused specific bugs there<\/a>.<\/p>\n

And although we normally always show the tabbar and the navbar, there are popup windows where we don’t (toolbar=no), which, you guessed it, causes bugs<\/a>.<\/p>\n

Then we have per-window private browsing, which has an indicator which makes things ‘fun’<\/a> (and soon private browsing will look even more different from normal browsing).<\/p>\n

Of course, while we stick to English layout direction is more or less fixed, but we ship both LTR and RTL locales on all platforms, which changes the order of things, which frequently<\/a> leads<\/a> to<\/a> bugs<\/a>.<\/p>\n

Then there’s the padding that we added for “customize mode”, which affects layout of the toolbars and the (‘fake’) titlebar, which had its own<\/a> problems<\/a>.<\/p>\n

Some issues are specific to pinned<\/a> or overflowing<\/a> tabs (sometimes even particular tabs<\/a>), as well as panorama\/tab groups<\/a>.<\/p>\n

Beyond that, styling is somewhat platform-specific, each with their own quirks:<\/p>\n

OS X<\/h2>\n

OS X is, in a certain sense, “easiest” because the OS doesn’t have a lot of options that mess with things (font size, for example, isn’t easily configurable). But there’s still some variation:<\/p>\n