Scheduled maintenance: Thursday, September 24, between 11:30am and 13:30pm UTC. This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn’t solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter

Rechercher dans l’assistance

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Alternate Stylesheets in local HTML file?

  • 9 réponses
  • 1 a ce problème
  • 177 vues
  • Dernière réponse par Dante

more options

It seems that Firefox on Win10 does not present alternate stylesheets in local files.

See for example: https://www.w3.org/Style/Examples/007/alternatives

I have a trivial HTML file, e.g., c:\alternate_stylesheet.html, with a few of those examples of alternative stylesheets, like:

 <link rel="alternate stylesheet"
       type="text/css"
       href="http://www.w3.org/StyleSheets/Core/Steely" title=Steely>
 <link rel="alternate stylesheet"
       type="text/css"
       href="http://dbaron.org/style/forest" title="Forest (by David Baron)">

Viewing such a trivial HTML page in Firefox on Win10, the View > Page Style list is the default - just "No Style" and "Basic Page Style". The list does not include the head link alternate stylesheet options.

Why not?

IE has no trouble with these (menu View > Style presents them as expected), which seems to confirm that the trivial HTML code is correct.

Any advice?

Solution choisie

Dante said

I at least see a hint that the fix could be released in v78.1.0.

That fix will come in:

  • Regular release channel: Firefox 79.0
  • Extended Support Release (ESR) channel: Firefox 78.1.0esr

But I looked at a locally saved copy of the W3C page in Firefox Developer Edition, which is a beta of Firefox 79, and I don't see the alternate stylesheets listed there. Same with Firefox Nightly, which is an early test version of Firefox 80. So I think you definitely need to file a separate bug about those stylesheets not being listed for pages opened on file:// URLs.

There were some new isolation measures for file:// URLs in recent versions, so it might be a loose end no one noticed when implementing those changes.

Lire cette réponse dans son contexte 👍 1

Toutes les réponses (9)

more options

Hmm, the developer tools show that Firefox retrieves the style sheets, so I'm not sure why they aren't exposed on the menu.

You could file a bug:

Cela vous a-t-il été utile ?

more options

I can use the Style Editor to disable the default stylesheet and enable one of the other style sheets.

  • https://media.prod.mdn.mozit.cloud/samples/cssref/altstyles/index.html

Cela vous a-t-il été utile ?

more options

See also: bug 1645789 - "Basic Page Style" entry in the View > Page Style menu doesn't work reliably

Cela vous a-t-il été utile ?

more options

Thanks for the confirmations. But 1645789 may fix this. I'm not quite sure how to read the bug report, but I at least see a hint that the fix could be released in v78.1.0. I'm not "up to date" with 78.0.1.

If v78.1 doesn't fix this for me, I'll submit a new bug report.

Thank you both!

Cela vous a-t-il été utile ?

more options

Solution choisie

Dante said

I at least see a hint that the fix could be released in v78.1.0.

That fix will come in:

  • Regular release channel: Firefox 79.0
  • Extended Support Release (ESR) channel: Firefox 78.1.0esr

But I looked at a locally saved copy of the W3C page in Firefox Developer Edition, which is a beta of Firefox 79, and I don't see the alternate stylesheets listed there. Same with Firefox Nightly, which is an early test version of Firefox 80. So I think you definitely need to file a separate bug about those stylesheets not being listed for pages opened on file:// URLs.

There were some new isolation measures for file:// URLs in recent versions, so it might be a loose end no one noticed when implementing those changes.

Cela vous a-t-il été utile ?

more options

Thanks, again. I've done that here:

https://bugzilla.mozilla.org/show_bug.cgi?id=1650603

Cela vous a-t-il été utile ?

more options

I did a quick test.
It works in Firefox 66.0.5, but Firefox 67.0.4 is broken.

Cela vous a-t-il été utile ?

more options

Note that it is better to attach a test file instead of pasting the code in a reply and even then you can use markup code (indent with four spaces or use backticks `code` or three backticks to enclose a block).

```
code
```

Modifié le par cor-el

Cela vous a-t-il été utile ?

more options

thanks for the clear guidance. much appreciated, as this is new territory for me.

Cela vous a-t-il été utile ?

Poser une question

Vous devez vous identifier avec votre compte pour répondre aux messages. Veuillez poser une nouvelle question, si vous n’avez pas encore de compte.