About the Pale Moon user interface layoutSeveral
people have asked why Pale Moon has not followed the Firefox GUI
(Graphical User Interface) layout. This document aims to provide a bit
of background to the choices made in Pale Moon and to explain the
reasoning behind the differences with Firefox.
These layout changes were not done lightly, or without thought. The
fact that the end result looks more conservative
is not necessarily because Pale Moon is
adverse to change, far from it. Rather, the layout is the result of
working with the existing elements and attempting to keep things
logical, efficient and intuitive. It is also because the design choices in Firefox were
considered regression rather than progression, and there being very
little that is truly "innovative" about the layout (as that implies
good reason for, and a clear and unmistakable advantage of, the new
state of things).
With the advent of Australis, an even clearer choice was made to not
follow the Mozilla Corporation's direction in their attempts to create
a "one size fits all" user interface from mobile phone to HD desktop.
There is no such thing, and to attempt it is folly, in my opinion. For
Pale Moon, there is also no reason to attempt "brand unity over
operating system unity" (meaning an attempt to make the browser look
the same regardless of operating system it is used on), and Pale Moon
rather aims for "operating system unity over brand unity" (meaning an
as high level of operating system integration as possible to provide a
familiar, well-intergrated user interface).
First off, some definitions for common terms/abbreviations:
- (G)UI: (Graphical) User Interface - This is what
constitutes everything in the browser that is not page content, meaning
all buttons, controls, menus, toolbars, the status bar, etc.
- UX: User eXperience - the name says it all, really.
- Standard UI convention: Something that has, either over
time or by peer agreement, been settled on as being "the standard way
of doing something in a user interface" and that is shared among a large number of applications.
- Affordance: Visually, the UI has clues that indicate
what it is going to do. Users don’t have to experiment or deduce the
interaction. The affordance of a UI is based on real-world (past) experiences or
standard UI conventions.
- Expectation: Functionally, the UI delivers the expected,
predictable results, without surprises. Users don’t have to experiment
or deduce the result of doing something. The expectations are based on labels, real-world
(past) experiences, or standard UI conventions.
- Efficiency: The UI enables users to perform an action
with a minimum amount of effort. If the intention is clear, the UI
delivers the expected results the first time, so that users don’t have to repeat the action (perhaps with variations) to get what they want.
- Responsiveness: The UI gives clear,
immediate feedback to indicate that the action is happening, and was
either successful or unsuccessful. Not to be confused with "reacting
quickly" per se, although the two can be considered close to each other.
The basic premise behind Pale Moon's choices is simple: Element grouping.
Grouping elements together with similar function or similar feedback is
very important to UI design; people have designated zones in the UI
where they can find groups of similar elements. This improves
affordance and efficiency of the UI, as the location of an element is a
clue to its function, and the intention is therefore clear.
This scattering about of controls has been a problem for layout for
several different popular browsers, including later versions of
Microsoft's Internet Explorer.
Grouping elements together with the objects they control is another
consideration that will increase the affordance, as the location is a
clear indication to what it will affect, making the result expected
when the element is used.
This will also improve ergonomics of browser use: The number 1 GUI
operation performed by users of a browser is switching tabs when they
use tabbed browsing. Grouping the tabs with the content they control
reduces the distance needed for the pointer to travel (from content to
tab) and therefore improves ergonomy.
The status barOne
of the most important changes in Pale Moon has
been to retain the status bar in the browser, after the (already
optional) element was completely removed in the development stages of
Firefox 4, and complete removal of that area of the browser for add-ons
(the add-on bar) in Australis.
A status bar is both a standard element (standard UI convention) for
applications that have status to report (and a web browser is certainly
one of those applications) and considered essential by a vast majority
of users as shown in a survey. Removing the status bar, and even
removing the option to have it if one wants it, has been a very
ill-conceived notion by the Mozilla UX team for Firefox. By including
the status bar, a small, peripheral-view element provides users with
several different types of feedback about the status of the browser. In
all respects, including the status bar is beneficial to the user
interface's level of intuitiveness: it provides affordance by showing
status text, in an expected location, and improves responsiveness.
Firefox's alternative for status text (the popup method) to display
network status and link addresses gives a comparable amount of
feedback, but in a much more intrusive way: by not having it in a
static element, the popup demands attention from the user, which is not
a good thing for the kind of information provided. After all: this kind
of information is secondary to the actual page content, and shouldn't
draw someone's attention. In addition, popping in and out rapidly while
browsing, the information can be very distracting or annoying. An
intuitive interface should not lead to frustration. Plus, the popup
status can't be configured or disabled, so in fact this has been two
steps back, not just one.
The status bar also provides more information than what has been
retained in the UI elsewhere. There is no page load
progress which is especially important for people on slower
connections, the status can no longer be set by web pages which is
important feedback for some web applications, etc.
By default, Firefox spreads different navigation controls out
horizontally over the browser. From a UI design perspective, this is a
very poor choice. Internet Explorer has suffered from the same poor
decision, and you can wonder if copycatting has been going on without
much thinking of the impact. Element grouping is important for these
controls, as is having the elements be a similar shape (not mixing bordered with borderless) and size,
resulting in the more classic look of the back/forward/reload-stop/home
controls being grouped together to the left of the address bar, and of
about equal size, being the default layout. All these elements control
In Australis, the way these controls are laid out is also no longer
configurable (as it was before) and everyone is forced into the
navigation toolbar layout as supplied "out of the box" by Firefox:
Controls spread out, with some in the URL bar and much smaller, and no
way to move the back/forward/reload/stop buttons to positions
suited to people's individual browsing styles.
Tabs on top
This has been a hot topic, and one could even call it "trendy" - but is it logical from a UI design perspective?
In some conditions, it is: when a browser is maximized or used in full
screen, having the tabs at or close to the edge of the browser means
they are at the edge of the screen. In this case, it becomes easier to
use, since the screen edge is a "hard" border and you don't have to be
as accurate to quickly select a different tab with a traditional pointing device - this follows Fitts' law concepts.
other cases, it is not -- including touch devices where screen edge
considerations don't apply and may even cause problems and annoyance if
it's a "hot edge" for the operating system. Considering that today's
high resolution screens - in this age, full HD being pretty much
standard with any desktop (and even laptop) system - most people use
their operating system with multiple
applications in regular windows, and not maximized. In this scenario,
having tabs on top means that, once again, element grouping (this time
of larger zones of the browser) is not followed. Consider the following
The left layout has tabs not grouped with the element they
control, but has static UI elements that are browser-wide inbetween.
The right layout has tabs grouped with the content. The tabs don't
control the way the navigation controls of the browser or the URL bar
look or behave, nor do they influence other toolbars that may be there;
they only control the page content. Both tabs and content are dynamic.
One could argue that the URL address is an exception to this, of
course, but in that case you would expect the URL field to be a
separate control in its own zone - which it is not for the sake of using space efficiently.
If you consider system elements of the window placed around these
layouts, like the application menu (which is a standard UI convention
to have), title bar and borders, potential side bar, additional browser
controls at the left and/or right end of the tab bar, etc., then it
becomes even clearer that, in the right hand layout, the hierarchy of the
elements is preserved: the outside being standard system elements
(OS-static), wrapping around the browser elements specific to the
program (application-static), which in turn wrap around content and
content controls, which are dynamic.
This is why the default in Pale Moon is to have tabs not
on top, as it's more logical to have them next to the content.
Australis completely removes the option to have the user interface laid
out in this way, and forces everyone to use tabs on top, regardless of
All is not lost: Configurability
Providing users with full configurability of the UI layout (as opposed
to the ever decreasing amount of configurability in Firefox), all of
these design choices are defaults
- and can be changed. In some cases it takes only 1 click (like tabs on
top, or making the status bar hidden), in other cases it takes a few
more steps, but even those are easy to follow.
So, if you don't like the way Pale Moon is laid out by default, then
play with the options and configure it the way you want it. To get
started, right-click an empty space in the tab bar or a standard
control (like the home button) and select "Customize...", or
alternatively click the Pale Moon button, Options, "Toolbar layout..."
Your browser, your web, your way!