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Span tags showing on an MDN page

Postat

I'm using FF29 to access https://developer.mozilla.org/en-US/Add-ons/Overlay_Extensions/XUL_School/The_Essentials_of_an_Extension . The span tags from the HTML are showing up in certain text boxes, and make the text very difficult to read. The text sometimes briefly displays correctly on initial page load, but in a few seconds, when all the css is applied and the font changes, the span tags show up in the text. I can display the page in IE8 and don't have this problem. It this the result of some setting? I notice that there is a notification inserted at the top of the page about a recent security breach. I wonder if insertion of this notice is throwing off some of the subsequent page content?

I will shortly post two screen prints, for FF and IE8. (It would be nice if screen prints could be uploaded with the original question.)
I'm using FF29 to access https://developer.mozilla.org/en-US/Add-ons/Overlay_Extensions/XUL_School/The_Essentials_of_an_Extension . The span tags from the HTML are showing up in certain text boxes, and make the text very difficult to read. The text sometimes briefly displays correctly on initial page load, but in a few seconds, when all the css is applied and the font changes, the span tags show up in the text. I can display the page in IE8 and don't have this problem. It this the result of some setting? I notice that there is a notification inserted at the top of the page about a recent security breach. I wonder if insertion of this notice is throwing off some of the subsequent page content? I will shortly post two screen prints, for FF and IE8. (It would be nice if screen prints could be uploaded with the original question.)

Alte detalii de sistem

Pluginuri instalate

  • Shockwave Flash 14.0 r0
  • Next Generation Java Plug-in 10.60.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Adobe PDF Plug-In For Firefox and Netscape 11.0.07
  • 5.1.30214.0
  • Amazon MP3 Downloader Plugin 1.0.18
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • DRM Netscape Network Object
  • Npdsplay dll
  • DRM Store Netscape Plugin

Aplicație

  • Firefox 29.0.1
  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:29.0) Gecko/20100101 Firefox/29.0
  • URL de suport: https://support.mozilla.org/1/firefox/29.0.1/WINNT/en-US/

Suplimente

  • Add Bookmark Here ² 29.0.20140506 (abhere2@moztw.org)
  • Auto-Sort Bookmarks 2.3 (sortbookmarks@bouanto)
  • CookieCleanup 1.0 (CookieCleanup@LarrysComputer)
  • Cookies Export/import 1.0 (CookiesIE@yahoo.com)
  • DOM Inspector 2.0.14 (inspector@mozilla.org)
  • InspectorWidget 4.04.20121231 ({c671b520-abe9-11d8-8ebc-000c6e787bf7})
  • Restart 1.0.11 (Restart@schuzak.jp)
  • SQLite Manager 0.8.1 (SQLiteManager@mrinalkant.blogspot.com)
  • Troubleshooter 1.1a (troubleshooter@mozilla.org)
  • userChromeJS 1.5 (userChromeJS@mozdev.org)
  • Microsoft .NET Framework Assistant 1.0 ({20a82645-c095-46ed-80e3-08825760534b}) (Inactive)

Javascript

  • incrementalGCEnabled: True

Grafică

  • adapterDescription: Mobile Intel(R) 915GM/GMS,910GML Express Chipset Family
  • adapterDescription2:
  • adapterDeviceID: 0x2592
  • adapterDeviceID2:
  • adapterDrivers: ialmrnt5
  • adapterDrivers2:
  • adapterRAM: Unknown
  • adapterRAM2:
  • adapterVendorID: 0x8086
  • adapterVendorID2:
  • direct2DEnabled: False
  • direct2DEnabledMessage: [u'tryNewerDriver', u'6.1400.1000.5218']
  • directWriteEnabled: False
  • directWriteVersion: 0.0.0.0
  • driverDate: 11-2-2004
  • driverDate2:
  • driverVersion: 6.14.10.3943
  • driverVersion2:
  • info: {u'AzureCanvasBackend': u'skia', u'AzureFallbackCanvasBackend': u'cairo', u'AzureContentBackend': u'cairo', u'AzureSkiaAccelerated': 0}
  • isGPU2Active: False
  • numAcceleratedWindows: 0
  • numAcceleratedWindowsMessage: [u'tryNewerDriver', u'6.1400.1000.5218']
  • numTotalWindows: 1
  • webglRendererMessage: [u'tryNewerDriver', u'6.1400.1000.5218']
  • windowLayerManagerRemote: False
  • windowLayerManagerType: Basic

Preferințe modificate

  • accessibility.blockautorefresh: True
  • accessibility.typeaheadfind.flashBar: 0
  • browser.cache.check_doc_frequency: 0
  • browser.cache.disk.capacity: 358400
  • browser.cache.disk.smart_size.first_run: False
  • browser.cache.disk.smart_size.use_old_max: False
  • browser.cache.disk.smart_size_cached_value: 266240
  • browser.newtab.url: about:blank
  • browser.places.smartBookmarksVersion: -1
  • browser.search.update: False
  • browser.search.useDBForOrder: True
  • browser.sessionstore.restore_on_demand: False
  • browser.sessionstore.upgradeBackup.latestBuildID: 20140506152807
  • browser.startup.homepage_override.buildID: 20140506152807
  • browser.startup.homepage_override.mstone: 29.0.1
  • browser.tabs.loadInBackground: False
  • browser.tabs.warnOnOpen: False
  • dom.mozApps.used: True
  • extensions.lastAppVersion: 29.0.1
  • gfx.blacklist.direct2d: 3
  • gfx.blacklist.layers.direct3d10: 3
  • gfx.blacklist.layers.direct3d10-1: 3
  • gfx.blacklist.layers.direct3d9: 3
  • gfx.blacklist.layers.opengl: 3
  • gfx.blacklist.stagefright: 3
  • gfx.blacklist.suggested-driver-version: 6.1400.1000.5218
  • gfx.blacklist.webgl.angle: 3
  • gfx.blacklist.webgl.msaa: 3
  • gfx.blacklist.webgl.opengl: 3
  • gfx.direct2d.disabled: True
  • keyword.enabled: False
  • layers.acceleration.disabled: True
  • network.cookie.cookieBehavior: 1
  • network.cookie.prefsMigrated: True
  • places.database.lastMaintenance: 1407835417
  • places.history.expiration.transient_current_max_pages: 12984
  • plugin.disable_full_page_plugin_for_types: application/pdf
  • plugin.importedState: True
  • privacy.clearOnShutdown.cookies: False
  • privacy.clearOnShutdown.downloads: False
  • privacy.clearOnShutdown.history: False
  • privacy.sanitize.migrateFx3Prefs: True
  • privacy.sanitize.sanitizeOnShutdown: True
  • storage.vacuum.last.index: 1
  • storage.vacuum.last.places.sqlite: 1407388085

Diverse

  • JS utilizator: Nu
  • Accesibilitate: Nu
Tyler Downer
  • Administrator
  • Moderator
1333 soluții 8855 răspunsuri

Please update to Firefox 31 before posting screenshots, 29 is not supported anymore

Please update to Firefox 31 before posting screenshots, 29 is not supported anymore
cor-el
  • Top 10 Contributor
  • Moderator
14591 soluții 132319 răspunsuri

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window
Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem. *Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance *Do NOT click the Reset button on the Safe Mode start window *https://support.mozilla.org/kb/Safe+Mode *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Deținătorul întrebării

Starting in Safe Mode did not fix the problem.

The affected text box is about 3/4 of the way down the page. The paragraph just before it reads "DTD strings are resolved and set when...".

The affected text box begins "let helloItem = document.getElementById...".

When the page gets fully loaded, the span tags abruptly appear in the text box. I'm wondering if others are seeing this problem as well? Maybe the page really has a bug at the moment.

Starting in Safe Mode did not fix the problem. The affected text box is about 3/4 of the way down the page. The paragraph just before it reads "DTD strings are resolved and set when...". The affected text box begins "let helloItem = document.getElementById...". When the page gets fully loaded, the span tags abruptly appear in the text box. I'm wondering if others are seeing this problem as well? Maybe the page really has a bug at the moment.