Note, I just noticed it doesn't appear on enwiki or enwikinews. It might be a local script or even a gadget...

Based on timing (It wasn't like this, this morning), I'd guess it might be related to https://gerrit.wikimedia.org/r/#/c/238160/ which was swatted today.

That seems unlikely, because we're still loading those styles (you can check with mw.loader.inspect()), they're just no longer in the top queue.

Also, any tips/pointers on how to install FF 3.5?

even with all my gadgets disabled (including default enabled gadgets), and user:Bawolff/common.js commented out, issue is still present.

Oh, I do have a bunch of errors (not sure why that isn't the first thing I looked at). Also, the top bar looks fine initially. Seems to get messed up after onready. Also, error does not happen when you do ?debug=true.

Exception in module-execute in module ext.centralNotice.display:
TypeError: Object.defineProperty is not a function TypeError: Object.defineProperty is not a function message=Object.defineProperty is not a function

Exception in store-localstorage-update:
[Exception... "Persistent storage maximum size reached" code: "1014" nsresult: "0x805303f6 (NS_ERROR_DOM_QUOTA_REACHED)" location: "https://commons.wikimedia.org/w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=T5zOVd1J Line: 175"] [Exception... "Persistent storage maximum size reached" code: "1014" nsresult: "0x805303f6 (NS_ERROR_DOM_QUOTA_REACHED)" location: "https://commons.wikimedia.org/w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=T5zOVd1J Line: 175"] code=1014 INDEX_SIZE_ERR=1 DOMSTRING_SIZE_ERR=2

In T112552#1638401, @Bawolff wrote:

Exception in module-execute in module ext.centralNotice.display:
TypeError: Object.defineProperty is not a function TypeError: Object.defineProperty is not a function message=Object.defineProperty is not a function

https://kangax.github.io/compat-table/es5/#Object.defineProperty I guess they're not loading the es5-shim? Dunno if that would cause other things to stop loading...

Exception in store-localstorage-update:
[Exception... "Persistent storage maximum size reached" code: "1014" nsresult: "0x805303f6 (NS_ERROR_DOM_QUOTA_REACHED)" location: "https://commons.wikimedia.org/w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=T5zOVd1J Line: 175"] [Exception... "Persistent storage maximum size reached" code: "1014" nsresult: "0x805303f6 (NS_ERROR_DOM_QUOTA_REACHED)" location: "https://commons.wikimedia.org/w/load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=T5zOVd1J Line: 175"] code=1014 INDEX_SIZE_ERR=1 DOMSTRING_SIZE_ERR=2

T66721: mw.loader.store should not occupy all of localStorage.

In T112552#1638421, @Legoktm wrote:

In T112552#1638401, @Bawolff wrote:

Exception in module-execute in module ext.centralNotice.display:
TypeError: Object.defineProperty is not a function TypeError: Object.defineProperty is not a function message=Object.defineProperty is not a function

https://kangax.github.io/compat-table/es5/#Object.defineProperty I guess they're not loading the es5-shim? Dunno if that would cause other things to stop loading...

https://gerrit.wikimedia.org/r/238205

I think the central notice thing is not related to causing this issue, as that error is on all sites, but things are only blowing up for me on commons.

Note that I and others are seeing rendering issues with the the notification icons on Commons in Safari which does support Object.defineProperty.

Change 238326 had a related patch set uploaded (by AndyRussG):
Fallback for browsers that don't support Object.defineProperty

https://gerrit.wikimedia.org/r/238326

This patch specifically fixes the Object.defineProperty issue in CentralNotice.

Change 238371 had a related patch set uploaded (by Legoktm):
Revert Echo to 1.26wmf21 version

https://gerrit.wikimedia.org/r/238371

Change 238371 merged by jenkins-bot:
Revert Echo to 1.26wmf21 version

https://gerrit.wikimedia.org/r/238371

An issue that I think is related: simplesearch also doesn't display suggestions in Safari. Just like the Echo bug, this only happens in Commons, when logged in, in non-debug mode. The issue goes away if you log out or enable debug mode. Just like with Echo, it happens because the .suggestions { position: absolute; } rule isn't applied, so the list of suggestions is rendered off-screen.

<s>So far all I have to go on is that RL is creating many many more <style> tags in Safari than in Chrome.</s> Never mind, that's not actually true.

This was caused by bad CSS in MediaWiki:Vector.css. Should be fixed with https://commons.wikimedia.org/w/index.php?title=MediaWiki%3AVector.css&type=revision&diff=172090985&oldid=171972596

> document.styleSheets[2].ownerNode.textContent.substr(21600,300)
"px}.mw-special-Userlogin #mw-content-text #signupend{margin-left:50%}#siteSub{display:inline;font-size:92%}@media screen #siteSub{display:none} body.page-Main_Page.action-view #siteSub{display:none !important}body.page-Commons_Mobile_app_Download.action-view #siteSub,body.page-Commons_Mobile_app_Dow"

Note #siteSub { display:inline; font-size:92% } @media screen #siteSub{ display:none }. This is not valid CSS.

In Chrome, this only causes the first rule after @media screen to be ignored (which is still bad!):

> document.styleSheets[2].cssRules[257].cssText
"#siteSub { display: inline; font-size: 92%; }"
> document.styleSheets[2].cssRules[258].cssText
"@media not all { 
}"
> document.styleSheets[2].cssRules[259].cssText
"body.page-Main_Page.action-view #siteSub { display: none !important; }"

Whereas in Safari, the CSS parser stopped completely:

> document.styleSheets[2].cssRules[257].cssText
"#siteSub { display: inline; font-size: 92%; }"
> document.styleSheets[2].cssRules[258].cssText
"@media {
}"
> document.styleSheets[2].cssRules[259].cssText
TypeError: undefined is not an object

Reported upstream as https://bugs.webkit.org/show_bug.cgi?id=149185

Change 238326 merged by XenoRyet:
Fallback for browsers that don't support Object.defineProperty

https://gerrit.wikimedia.org/r/238326