- Fixed issue where probing for default colors didn't work correctly. In addition to possible incorrect re-coloring, this could also result in performance issues as the extension no longer recognized that styles were set by the author already.
- Fixed issue where foreground color may not have been set when author only sets background image.

Minor bugfixes:
- Turning off extension in popup would not disable the mutation observer, resulting in extension continuing to
apply itself to dynamic elements.
- Using the override buttons in the popup would fail if the user specifically clicked on the text specifying the url.

- Better handle elements that only have a background image defined.

Bugfix for possible infinite loop on sites that clear the extension's data attributes

Fix issue with some input elements being incorrectly styled since last version.

Remove some leftover console debugging code

Removed all usages of getDefaultComputedStyle(), as it's been slated for removal (see https://bugzilla.mozilla.org/show_bug.cgi?id=1355683)

- Improve contrast check on input elements. This should result in less instances of the extension unnecessarily 'fixing' elements.

- When running in an [i]frame list checks now use root tab url instead of frame url
- Fixed bug where clearing a list after it had been set broke extension functionality for that session.

- In whitelist mode, toggle button now allows the extension to be temporary turned on in order to preview effects.
- Fix failure of standard colors override list when user is not running system colors.

- Performance improvements to mutation observers
- Controls in popup for adding current site to lists
- Cache options in background script to remove need to re-access storage for every page
- Fixes for a couple of rather dumb bugs.

- More fixes for special cases involving cross-origin frames
- Fix inability to clear override lists
- Fix button badge text being out of sync of what really happens

Some fixes for performance regressions in last version.

Major overhaul to how extension actions are triggered:

- Background script dispatches content scripts as needed, instead of the
manifest file. This results in better control of when scripts run.

- Separate scripts for fixing input elements only and fixing all elements. This
minimizes the size of the scripts that are run day-to-day, especially for
users who only need fixes to input elements.

- Added whitelist functionality. The blacklist can now be treated as a whitelist
instead, via a checkbox in the options.

- Some improvements to handling iframes. Some corner cases have been fixed as a
result; others still require move work.

A couple of minor fixes for a few edge cases

Re-add checking for existing contrast when fixing input elements.

- Fix some specific cases of extension improperly overriding colors when it shouldn't be.
- Extension restores itself when sites that clear attribute data.
- Fix range type styling
- Add 2 additional configuration options:
- Target contrast ratio. Now defaults to WCAG AA limit of 4.5.
- Delay before extensions runs. Added to improve compatibility with other style-modifying extensions, to ensure they can properly complete insertion of
custom CSS before this extension runs
- Take advantage of ES6 features in order to clean up code some more

- Fix mis-detection of 'use system colors' setting causing performance issues
when it is not set.
- Add ability to over-ride extension behavior based on URL. Extension can either
be disabled, or can force black-on-white colors.
- Handling of iframes overhauled to make it a bit less fragile.

Bugfix: Possible exception in extension when checking for an SVG document could prevent further contrast checks.

Fix an issue with extension adding unnecessary background color to root elements (like HTML and BODY) that are transparent by default, and author has defined a transparent image.

- Improved detection of user setting non-standard colors.
- Perform contrast check on iframes.
- Perform contrast check on some forms of SVG embeds.
- Override site CSS that uses !important but still has wrong contrast.

For users that enable 'use system colors', added option to toolbar button that forces root element of page to be black text on white background, effectively allowing users to temporarily disable the 'use system colors' setting for a tab.

- Now uses custom data attributes to assign styles via CSS.
- No longer re-analyses elements that have already been checked, resulting in major performance improvement in pages with dynamic element [re]creation.
- Button in browser toolbar can be used to temporarily disable extension for current tab.

Remove some deprecated manifest keys that may be causing install issues

Medium overhaul of addon:

- Ported to Web-Extensions API
- Re-colors elements whose class attribute has been changed by javascript