Websites look wrong: Difference between revisions

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[[Gecko]]-based applications, like the [[Mozilla Suite]] and [[Firefox]] are designed from the bottom up to support sites written with [http://w3.org/ W3C] standards. However, other browsers sometimes use alternate methods to format pages which are not supported by the Mozilla Suite or Firefox. The best long term solution is to respectfully ask the website developer if they can make their page work in Mozilla. For help on doing this, visit the [http://www.mozilla.org/projects/tech-evangelism/site/ Tech Evangelism project page]. If this is not possible, there are a few things you can try to get the site to work as designed.
A website may look wrong for many reasons. The website might not follow [http://en.wikipedia.org/wiki/Web_standards web standards] and use code that works in Internet Explorer but causes display problems in Firefox or other Mozilla browsers.  If the website doesn't work in Firefox or Mozilla Suite by design, the best long term solution is to respectfully ask the website developer if they can make their page work in Firefox/Mozilla Suite. For help on doing this, see the [http://www.mozilla.org/projects/tech-evangelism/site/ Tech Evangelism project page].
 
The problem may also be related to your browser settings or configuration, a Firefox/Mozilla Suite bug, a [[Problematic extensions | problematic extension]] or another program that is blocking web content.  If you don't find an answer below, look through all articles related to web page display, listed [[:Category:Websites | here]].
 
==Common problems and solutions==
These articles contain solutions and provide more information about some common problems with web page content and page display:
* [[Images or animations do not load | Images or animations do not load or look wrong]]
* [[Website colors are wrong]]
* [[Zoom text of web pages]]
* [[Page displays as gibberish]]
* [[Video or audio does not play]]
* [[Opening files using plugins]]
* [[Object has been blocked]]
* [[Error loading websites]]
* [[Resizing oversize window]]
 
==Other solutions==
* In Firefox, go to "View -> Page style" and change "No Style"  (in Mozilla Suite/SeaMonkey, go to "View -> Use Style" and change "Basic Page Style") to whatever else is there,  if it's not already checked. Conversely, websites designed with faulty CSS ([http://en.wikipedia.org/wiki/Cascading_Style_Sheets Cascading Style Sheets]) can cause page display problems with things like font, color and layout. In such cases, using the "No Style" or basic setting may allow page content not otherwise viewable to be displayed, using only the HTML layout [http://www.jsware.net/jsware/foxtips.php3#ssp].
*Sometimes [[incremental reflow bugs]] or layout problems on a specific page can be fixed by forcing a page reflow. This can be as simple as changing the font size of the page, resizing the window, toggling the page style or reloading the page.
* Clear all cookies.  In Firefox "[[Menu differences in Windows, Linux, and Mac| Options]]: "Privacy  -> Cookies -> Clear Cookies Now" (Firefox 1.5) or in "Privacy -> Show Cookies -> Remove all cookies" (Firefox 2).  In Mozilla Suite preferences, under  "Privacy & Security -> Cookies -> Cookie Manager".
* [http://en.wikipedia.org/wiki/Wikipedia:Bypass_your_cache Bypass the cache] and reload the current page, by holding down the Shift key as you click the "Reload" button on the toolbar.
* Clear the cache:  In Firefox [[Menu differences in Windows, Linux, and Mac| Options]]: "Privacy -> Cache -> Clear Cache Now" (Firefox 1.5) or  "Advanced -> Network -> Cache -> Clear now" (Firefox 2).  In Mozilla Suite preferences, under "Advanced -> Cache -> Clear Cache".
* The page may require cookies or popup windows.  In Firefox, enable cookies in the Privacy options and enable popup windows under Content.  In Mozilla Suite, these settings are enabled under "Privacy & Security -> "Popup Windows" and "Cookies". Also check for related settings in your Internet security software.
* Many websites need [[JavaScript]] to work correctly and some require [[Java]]. Make sure these features are enabled in your browser settings and are not being blocked by an extension or by your internet security software.
* Security software that filters web content or that includes ad-blocking or site-screening features may prevent certain web pages from fully loading. Temporarily disable the security software or go through the program options and disable the content-blocking feature [http://forums.mozillazine.org/viewtopic.php?p=2428893#2428893].
* Install a [[General_concepts#User_agent |user agent]] spoofer, such as the [https://addons.mozilla.org/extensions/moreinfo.php?id=59 User Agent Switcher extension], to make the web site think you are using a different browser.
* Go through the [[standard diagnostic]] steps for Firefox or Mozilla Suite.


==Possible solutions for website developers==
==Possible solutions for website developers==
* Make sure the coding of your website is valid and up to standards (e.g., supports multiple OSes and browsers). For help on this please visit [http://www.w3c.org/ W3C.org] (World Wide Web Consortium) and [http://www.htmlhelp.com/ HTMLhelp.com].
*Ensure your code completely or nearly validates to W3 specifications. Use the [http://validator.w3.org/ HTML Validator] and the [http://jigsaw.w3.org/css-validator/ CSS Validator] to find errors in your website.
* To check the validation of your website visit both [http://validator.w3.org/ HTML Validator] and [http://jigsaw.w3.org/css-validator/ CSS Validator].
*Check the JavaScript Console for errors and warnings.
* View and edit website coding through a real-time HTML editor [http://www.squarefree.com/htmledit/].  
*Post in the [http://forums.mozillazine.org/viewforum.php?f=25 Web Development forum] at mozillaZine to get help with your site.
* Extensions such as  [http://users.skynet.be/mgueury/mozilla/ HTML Validator] and [http://chrispederick.com/work/webdeveloper/ Web Developer] can be helpful with validation and HTML source.
*Additional resources for web developers trying to identify and solve problems can be found in the [[#External links |external links]] section of this article.
* There are also multiple tools that can validate your website for you, e.g. [http://www.w3.org/People/Raggett/tidy/ HTML Tidy], [http://www.chami.com/html-kit/ HTML-Kit], and [http://www.w3.org/Tools/ W3C tools].
<!-- SEE ALSO -- not here because what would normally be here IS the LEAD topic -->


== Possible solutions for users ==
==External links==
* Make sure the option or preference to only load  images from the originating web site is not selected.  In Firefox, look under "Tools -> Options -> Content (Web features in 1.0.x) -> Load Images [For originating web site only]. In Mozilla Suite, look under "Edit -> Preferences -> Privacy &amp;amp; Security -> Images" to ensure that  "Accept Images that come from the originating server only" is not checked.  
*[http://developer.mozilla.org/en/docs/Using_Web_Standards_in_your_Web_Pages Using Web Standards in your Web Pages] is a complete, updated and well structured set of tips, info, explanations and procedures to upgrade webpages to make them work and render as correctly as possible in Firefox 2, MSIE 7, Opera 9, Safari 3, Icab 3, Seamonkey 1.x and in any W3C web standards compliant browser.
* Make sure that images from specific sites are not blocked.  In Firefox, look under "Tools -> Options -> Content (Web features in 1.0.x) -> Load Images [Exceptions].  In Mozilla Suite, look under  "Edit -> Preferences -> Privacy &amp;amp; Security -> Images -> Manage Image Permissions".    Remove  any culprits and press "OK".
*[http://www.mozilla.org/docs/web-developer/faq.html Mozilla Web Author FAQ]
* Clear your cache and cookies in Firefox  "Privacy" options (under  "Cache" and "Cookies" )  or in Mozilla Suite preferences  (under "Advanced -> Cache" and  "Privacy &amp;amp; Security -> Cookies -> Cookie Manager"). 
* [http://www.javascripttoolbox.com/bestpractices/ Javascript Best Practices] lists some of the most frequent coding practices which create problems for javascript and DHTML-driven webpages in Firefox and in modern mainstream browsers. The web page explains and proposes, with small examples, the best coding practices and most recommendable ways of developing problem-free javascript code.  
* In Firefox, go to Go to "View -> Page style" and change "No Style" (in Mozilla Suite, "View -> Use Style and change  "Basic Page Style") to whatever is there if it's not already checked.
* If you have Adblock check it from the status bar to see if anything is being blocked, and remove it from Adblock's preference window: "Tools -> Extensions", then double-click "Adblock".
* Make sure your firewall isn't blocking Mozilla Suite or Firefox from getting page content.
* The page may require cookies or popup windows. Enable these features  in Firefox options under Content (Web Features in 1.0.x)  or in Mozilla Suite's preference settings under "Privacy &amp;amp; Security -> "Popup Windows" and "Cookies".
* The page may require [[JavaScript]].  Enable  JavaScript in Firefox options under "Content" ("Web Features" in 1.0.x) or in Mozilla Suite preferences under "Advanced -> Scripts&amp;amp; Plugins > Enable JavaScript for  -> Navigator".
* The page may require [[Java]].  Make sure that  Java  is installed and enabled in the browser.  In Firefox, enable Java via "Tools -> Options -> Content ("Web Features" in 1.0.x) .  In Mozilla Suite,  enable Java under "Edit -> Preferences -> Advanced".
* If the problem is with a plugin like [[Flash]] or [[Windows Media Player]], see the linked kb article.
* See [[Error loading some websites]].
* Sometimes layout problems can be fixed by [[Incremental reflow bugs | forcing a page reflow]].
* Install a [[user agent]] spoofer, such as [https://addons.mozilla.org/extensions/moreinfo.php?id=59 User Agent Switcher extension], to make the web site think you are using a different browser.
* Sites that almost work, but need modification, can sometimes be fixed with [http://greasemonkey.mozdev.org GreaseMonkey] and an onslaught of [http://extensionsmirror.nl other extensions], which would allow you to change how the page looks and acts. You can try to change the page yourself, or see if [http://dunck.us/collab/GreaseMonkeyUserScripts#head-8365decd714f9162e9db9eb6e33c7e1f666cfb6b someone else has written a fix] (for GreaseMonkey, a script aka GMS or GM Script).
* If everything else fails, on Windows, you can install [http://extensionroom.mozdev.org/more-info/ieview IE View] which allows you to right-click open pages in IE.
* If nothing worked for you this far (and Internet Explorer is not your weapon of choice) then the website's coding might be flawed and not up to [http://w3c.org standards]  (with poorly written coding). As a last resort try contacting the webmaster and complain about the nonfunctional website.


== Gecko limitations ==
''(The page Firefox Support page "Websites look wrong" https://support.mozilla.org/kb/Websites+look+wrong is based on this page, http://kb.mozillazine.org/Websites_look_wrong ).''
* Cannot use Microsoft's Java VM. Use an alternative, such as [http://www.java.com Sun's Java VM].
* Cannot render [[wikipedia:VML|VML]] or do VML scripting. Try using [[SVG]] instead.
* Menus and other scripts that use <code>document.layers</code> will not work. Developers: see [http://www.stopbadtherapy.com/standards.shtml this site] for more information.
* Partial support for <code>document.all</code> and <code>document.<id></code> (but not <code>document.<name></code>) has been added to Firefox 1.0.
* Occasionally page layouts will be displayed incorrectly due to [[incremental reflow bugs]] in the current release of Firefox. Oftentimes a more recent build will render the same pages correctly.
* [[ActiveX]] controls are not supported in most Gecko browsers. If possible, use a plugin interface instead, which is possible with  [[Windows Media Player]].
* [http://windowsupdate.microsoft.com Microsoft Windows Update] must, by design, be run in Windows on Internet Explorer. There are some 3rd party sites that allow access to some updates, such as [http://windowsupdate.62nds.com/ WindizUpdate].
* Firefox strictly interprets the W3C spec for HTML comments; as a result, some of the contents of malformed comments might be rendered. See [https://bugzilla.mozilla.org/show_bug.cgi?id=102127 bug 102127].


[[Category:Page display]]
[[Category:Issues (Firefox)]]
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[[Category:Issues (Mozilla Suite)]]
[[Category:Websites]]

Latest revision as of 01:10, 30 December 2011

A website may look wrong for many reasons. The website might not follow web standards and use code that works in Internet Explorer but causes display problems in Firefox or other Mozilla browsers. If the website doesn't work in Firefox or Mozilla Suite by design, the best long term solution is to respectfully ask the website developer if they can make their page work in Firefox/Mozilla Suite. For help on doing this, see the Tech Evangelism project page.

The problem may also be related to your browser settings or configuration, a Firefox/Mozilla Suite bug, a problematic extension or another program that is blocking web content. If you don't find an answer below, look through all articles related to web page display, listed here.

Common problems and solutions

These articles contain solutions and provide more information about some common problems with web page content and page display:

Other solutions

  • In Firefox, go to "View -> Page style" and change "No Style" (in Mozilla Suite/SeaMonkey, go to "View -> Use Style" and change "Basic Page Style") to whatever else is there, if it's not already checked. Conversely, websites designed with faulty CSS (Cascading Style Sheets) can cause page display problems with things like font, color and layout. In such cases, using the "No Style" or basic setting may allow page content not otherwise viewable to be displayed, using only the HTML layout [1].
  • Sometimes incremental reflow bugs or layout problems on a specific page can be fixed by forcing a page reflow. This can be as simple as changing the font size of the page, resizing the window, toggling the page style or reloading the page.
  • Clear all cookies. In Firefox " Options: "Privacy -> Cookies -> Clear Cookies Now" (Firefox 1.5) or in "Privacy -> Show Cookies -> Remove all cookies" (Firefox 2). In Mozilla Suite preferences, under "Privacy & Security -> Cookies -> Cookie Manager".
  • Bypass the cache and reload the current page, by holding down the Shift key as you click the "Reload" button on the toolbar.
  • Clear the cache: In Firefox Options: "Privacy -> Cache -> Clear Cache Now" (Firefox 1.5) or "Advanced -> Network -> Cache -> Clear now" (Firefox 2). In Mozilla Suite preferences, under "Advanced -> Cache -> Clear Cache".
  • The page may require cookies or popup windows. In Firefox, enable cookies in the Privacy options and enable popup windows under Content. In Mozilla Suite, these settings are enabled under "Privacy & Security -> "Popup Windows" and "Cookies". Also check for related settings in your Internet security software.
  • Many websites need JavaScript to work correctly and some require Java. Make sure these features are enabled in your browser settings and are not being blocked by an extension or by your internet security software.
  • Security software that filters web content or that includes ad-blocking or site-screening features may prevent certain web pages from fully loading. Temporarily disable the security software or go through the program options and disable the content-blocking feature [2].
  • Install a user agent spoofer, such as the User Agent Switcher extension, to make the web site think you are using a different browser.
  • Go through the standard diagnostic steps for Firefox or Mozilla Suite.

Possible solutions for website developers

  • Ensure your code completely or nearly validates to W3 specifications. Use the HTML Validator and the CSS Validator to find errors in your website.
  • Check the JavaScript Console for errors and warnings.
  • Post in the Web Development forum at mozillaZine to get help with your site.
  • Additional resources for web developers trying to identify and solve problems can be found in the external links section of this article.

External links

  • Using Web Standards in your Web Pages is a complete, updated and well structured set of tips, info, explanations and procedures to upgrade webpages to make them work and render as correctly as possible in Firefox 2, MSIE 7, Opera 9, Safari 3, Icab 3, Seamonkey 1.x and in any W3C web standards compliant browser.
  • Mozilla Web Author FAQ
  • Javascript Best Practices lists some of the most frequent coding practices which create problems for javascript and DHTML-driven webpages in Firefox and in modern mainstream browsers. The web page explains and proposes, with small examples, the best coding practices and most recommendable ways of developing problem-free javascript code.

(The page Firefox Support page "Websites look wrong" https://support.mozilla.org/kb/Websites+look+wrong is based on this page, http://kb.mozillazine.org/Websites_look_wrong ).