Column Reader makes reading a pleasure by providing the following features (see Screenshots 2 & 3):
> Paper, scroll and book layouts.
> Up to five columns for wide screens.
> Four different scrolling modes.
> Document miniature view in scroll bar.
> Replacement of fonts by a local font.
> Color schemes and color transforms.
> Full screen image view with pan and zoom.
> Storage of settings for pages and domains.
Enter/exit reader. Column Reader adds a toolbar button from which you may 1) enter the content selection mode or may 2) directly enter the reader mode in case settings had already been saved for the active page or domain (see Screenshot 3).
To exit the reader, click the Column Reader button or press ESC. To also close the original tab, click the close icon.
Saving settings. In the reader mode, take some time to find the settings that suit you most. Then use the buttons to save these settings as the general default or merely for the current page or domain.
The settings that are saved are the following: column count, layout, mask, margins, scroll mode, full screen mode, font replacement, line height, color scheme, color transform and hidden elements. In addition, for pages and domains, the location of the selected element is saved, while for individual pages, the scroll location is saved.
Scrolling. The keys that can be used to scroll are the following: arrow left / arrow right / page up / page down / arrow up / arrow down / space / home.
Reader areas that have a scroll function are recognizable by a custom mouse cursor. Content elements that can be scrolled horizontally show a horizontal arrow cursor.
> In case content is too wide to fit a column, your best option is to reduce the number of columns (ctrl+down).
> In case content does not appear or cannot be read, your best option is to press the color scheme button.
> Left-click is disabled inside Column Reader (except for internal links) for safety, but you may still use right-click.
The following issues will be gone in the next version:
> Index shows wrong miniatures after zooming.
> After choosing different colors/fonts, the original colors/fonts can be restored only by restarting the reader.
> Selecting a different color scheme can lead to unreadable text on some pages.
The next version (5.0) will work in Firefox 35.0 and newer and will be compatible to multi-process Firefox. It won't work any more in Thunderbird and it will loose backward compatibility for all saved domain associations.
You may want to go on using the previous version. In that case, simply install version 4.1 from this extension's versions page and prevent it from updating in the Addon Manager. The saved domain associations are retained as long as you do not uninstall.