Browser compatibility & Dynamics CRM: a complicated marriage

The introduction of browser compatibility in Dynamics CRM (launched with UR12 for CRM 2011) was a big step for everybody using the platform, sadly this important change wasn't painless.
Several CRM implementations were done considering that Internet Explorer was the only compatible browser and this was quite the standard until CRM 4.0. With CRM 2011 Microsoft provided JavaScript supported methods (the Xrm namespace) to interact with Dynamics CRM in order to avoid DOM Manipulation.

Dynamics CRM developers struggle everyday between top-notch requirements and the limits of supported customizations, an endless fight without a definitive winner.

From some months a new variable must be considered: the browser used and its version. I already wrote about the argument (The browser compatibility cake is a lie) but new issues surfaced with the latest version of Google Chrome (V39) and a small recap regarding the browser compatibility can be useful.

Fact number 1: The supported browsers are Internet Explorer, Firefox, Google Chrome, Safari.
Not all OS are supported, for example Firefox and Google Chrome are not supported on Mac OSX, so it's necessary to check the compatibility lists.

Fact number 2: Google Chrome is the browser that caused most of the issues.
It's started with V37 with the removal of the showModalDialog method (fix link) and continued in V38 with the partial introduction of ES6 support (details link). V39 has a window.close error connected to the showModalDialog function (Chromium issue), where the popups (like a solution import) don't close by themselves after they completed the job.

Fact number 3: showModalDialog will work only until 30 April 2015.
The EnableDeprecatedWebPlatformFeatures setting states clearly that is until the end of next April. Less than 5 months for this temporary solution. Maybe the HTML5 tag <dialog> will be used?

Fact number 4: Google doesn't provide an archive of Google Chrome releases.
You want to install Google Chrome V36? You need to find the offline setup somewhere else. Remember that installing an older browser version is not suggested (security reasons).

Personally I don't like the phrase "Internet Explorer is the preferred browser for Dynamics CRM" that sometimes I read in some forums, because Microsoft invested time and resources to provide the browser compatibility for Dynamics CRM, efforts vanished for the most part by an "aggressive" update policy of Google Chrome.
Keep informed your users about the browser compatibility status and guide them in the choice of the browser used for Dynamics CRM.

Google Chrome registry fix for Dynamics CRM 2011/2013

Due to the errors caused by the latest Google Chrome update (details here) I created .reg file to reactivate showModalDialog API, you can download from here:

Enable Chrome showModalDialog.reg

After the download is completed close Google Chrome, double-click the .reg file and click Yes to the Registry Editor prompt:

I also created a page to test the showModalDialog API:

Test Page for showModalDialog API

The (browser compatibility) cake is a lie

Some days ago Google updated Google Chrome reaching version 37. Several Dynamics CRM users reported issues with this version like:

• Export to Excel is not working
• System settings are not saved
• Form editor doesn't accept the changes

UPDATE:
A registry fix is available:
Google Chrome registry fix for Dynamics CRM 2011/2013

The reason is that showModalDialog API has been deprecated inside Chromium (the engine used by Google Chrome) more information here:
Disabling showModalDialog
Neil McDonald found a solution using a Group Policy, details in his blog:
Chrome 37 breaks CRM 2011 functionality

The current solution is "use another browser".

And before you are able to finish the word "browser" the obvious question is prompted to you: "But Microsoft states that Dynamics CRM is supported on the latest browser versions, why it's not working?"

The question is totally legit and MSDN has also a page about: Web application requirements for Microsoft Dynamics CRM 2013

Microsoft simply made a promise they can't always deliver, because they don't develop Google Chrome or the other browsers they decided to support, ergo "the cake is a lie".
With Google Chrome there is also another problem: you can't rollback to an older version because Google doesn't keep a public archive of their builds. So another question surfaces: "How can I avoid to have these issues again?"

The answer is to prioritize the supported browsers, naturally Internet Explorer will be your first choice (version 11, not version 8 please) and Firefox as an alternative, because they keep a public archive of their builds: https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/
If in the future a Firefox release is not compatible with Dynamics CRM, the users can always install the previous working version (shame on you Google Chrome!).