Following is a chronological account of all the recent updates and modifications carried out on the Prefixr tool ever since its creation. As you can see, this tool has come a long way to become the best one in the business today!

June 6th, 2012
- border-radius and a few box-shadow prefixes were done away with.

May 5th, 2012
- ms-user-select support was added.

March 27th, 2012
- An Opera prefix for the keyframes was added.
- Support for the transform-style prefix was added.

March 13th, 2012
- An issue leading to incorrect expansion of columns upon inclusion of name in the element, was fixed.

February 14th, 2012
- Animations will not display any irrelevant prefixes any more. For example, @-moz-keyframescode> isn’t supposed to contain something of the –webkit-box-shadow sort. Although this update requires some more cleanup and logic, it’s almost there and won’t do any harm to the code.

February 13th, 2012
- An issue causing multiple, comma separated CSS3 gradients to lead to missing prefixes for all the references but the first one, was fixed.

January 3rd, 2012
- Fixed an issue related to the frequent breakage of properties like cursor: nw-resize.
- Support for prefixing display: box was added.
- Mozilla no longer likes the keyframe names to be wrapped up inside quotes. Appropriate changes made.

January 2nd, 2012
- Fixed an issue regarding the leftover khtml properties getting applied incorrectly to others, for example, khtml-padding.
- Support for radial-gradient syntax added to the tool.

December 24th, 2011
- Prefixr puts a limit on the size of the style sheet it can process with ease. The allowed size has been tripled in size.

December 20th, 2011
- Comma separated values related transitions were occasionally stripping other properties. Appropriate corrections have been done. Now something like –webkit-transition: opacity 1s, -webkit-transform .2s ease-in will Prefixize perfectly!
- Got rid of the old webkit syntax support, required for the creation of gradients. It was quite buggy and needed plenty of overhead.

November 23rd, 2011
- Got rid of a bug which was causing incorrect prefixing of the classes having the ‘column’ in them.

November 12th, 2011
- Fixed a bug wherein multiple transform properties inside a style were screwing up with each other.
- Support for the transform-origin added.

November 10th, 2011
- Replaced the constant usage of three spaces for every line with a tab.

November 8th, 2011
- Support for different animation-X properties added to the tool.
- Corrected a couple of regressions that were causing improper working of the compression and removal of comments.
- Added support for the variables. However, it must be noted that in order to make this feature work with the API, the entire style sheet must be passed through Prefixr. Else, Prefixr might end up removing those rules as it won’t have any access to the variable declarations.

November 3rd, 2011
- Got rid of a bug involving occasional cancellation of similar properties by each other. For instance, transition-duration and transition-delay.

November 1st, 2011
- Added Internet Explorer 10 support for the animation property.
- Added comprehensive support, including the Internet Explorer 10 support for keyframes.

October 28th, 2011
- Got rid of a bug wherein a syntax like –webkit-transition: box-shadow 1s would mess up the rendering.

October 27th, 2011
- Fixed an issue regarding the non-selection of the text area.
- Got rid of a bug wherein the commented properties remained uncommented even after Prefixation.
- columns support was added.
- Got rid of a problem wherein the column-width and column-gap were getting overlapped, causing the removal of one of them.

October 10th, 2011
- Got rid of all the khtml prefixes, as they seemed unnecessary.

October 7th, 2011
- The Internet Explorer filters were creating problems for formatted CSS. Fixed the issue.

October 4th, 2011
- Internet Explorer filters for opacity were added.

September 29th, 2011
- A bug causing incorrect rendering of the box-sizing was fixed.

August 29th, 2011
- A bug was causing problems with the updation process if a class was given the same name as the property. For instance, the ‘box-shadow’ class. Fixed it.

August 15th, 2011
- Support for user-select added.
- Proper support for the display:box added.

August 8th, 2011
- The support for transition-delay was added.
- It will now be possible to specify a line break after every CSS 3 property block. It’ll help in better readability. The option is turned on by default, and can be disabled through the ‘Add line break after CSS3 properties’ check box.

August 6th, 2011
- Support added for the transition-property, transition-timing- function and transition-duration.

August 5th, 2011
- Support for the box-sizing property was added.

August 4th, 2011
- Fixed the issue of the word ‘transition’ in the classes getting incorrectly prefixized too.
- Fixed a bug related to the conversion of linear gradients.
- It’ll now be possible to use the following syntax for gradients: -webkit-gradient (linear, 0% 0%, 0% 100%, from(rgb(10,10,15)), to (#FFF)).

You can carry out some internet research to learn about more recent updates in this useful CSS tool.