Block-style select disabled on Edge

[nicozerr]

Hi.

The block-style select field is disabled, grayed, only on Edge (Windows 10) with TYPO3 7.6 and 8.7. Everything is fine on Chrome, Firefox and IE 11.

We tried the following things:

• "SetEnvIfNoCase Request_URI .css$ no-gzip dont-vary" in .htaccess
• "mod_gzip_on No" and "mod_gzip_send_vary Off" in .htaccess (error 500)
• "GLOBALS['TYPO3_CONF_VARS']['BE']['compressionLevel'] = 0;" in LocalConfiguration.php

The problem looks like this: https://docs.typo3.org/typo3cms/extensions/rtehtmlarea/Troubleshooting/GzipCachingProblem/Index.html.
But no way. Nothing works.

Do you have an idea ?

Screenshots:
Edge: http://prntscr.com/i5fxvi
Chrome: http://prntscr.com/i5fydi

Microsoft Edge 41.16299.15.0
Microsoft EdgeHTML 16.16299
Windows 10 x64 Pro
TYPO3 7.6.22 & 8.7.9

[stevenMouret]

Hi Nicolas,

It seems that the problem is not with Gzip cache because it's about old versions of Internet Explorer 4/5/6.

Parser.js seems to be the cause.

[stevenMouret]

Apparently, in the file Parser.js in the function Parser.prototype.parseStyleSheets the function this.parseRules have a CSS rules in parameter.
In Edge, the argument (CSS rules) in the function Parser.prototype.parseRules is empty.
Perhaps, there is a limit size for argument in Edge.

[stevenMouret]

In fact it's the prototype cssRules that pauses problem. In Edge it is impossible to access to this function : "Permission denied". If you test styleSheet.cssRules, it is empty with Edge. I have test with Chrome and it's ok.