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Allow HTML Temp (English)

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Allow HTML Temp
Version 3.6.4
Thunderbird: 17.0 - 24.*
Betriebssystem: Windows, Mac OS X, Linux
Lizenz: GPL, LGPL, MPL
Sprache: multiple
Download: allow_html_temp-3.6.4-sm.xpi

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This extension allows to have HTML Temp enabled/allowed in the selected message by only one click. This makes life easier for all people using plain text mode as default.



You've to customize the toolbar first. Right click the toolbar and select Customize.... Now you can drag the new "Show HTML" button to your toolbar.

Now you can select View > Message body > Plain text. In your inbox select a newsletter containing HTML code. The newsletter will be shown in plaintext only.

Newsletter in plaintext mode

The message is bad to read in plaintext mode. I trust in the sender. So I choose to click the new "Show HTML" button or the buttons dropdown "Show HTML and remote images":

  • Tabbar toolbar button
  • Main toolbar button
AHT button maintoolbar.png
  • Messageheader button
AHT button messageheadertoolbar.png

If you choose to allow remote images, this will be permanent for the chosen message! This is Thunderbirds default behaviour for remote images. Nevertheless HTML will only be allowed temp.

The message is now temporarily shown in HTML mode (without or with remote images).

HTML original
HTML original with remote images

If you switch to another message, it'll be shown automatically again in the default plaintext mode. It isn't necessary to switch back using the menu - so no more click is necessary.

Statusbar pane

Statusbar pane with contextmenu

In Statusbar you'll get an information about the actual HTML mode ("Original HTML", "Simple HTML", "Plain Text").

It's possible to switch the HTML mode in statusbar panes context menu. The options are the original ones from the application.


Function no Key Command Key (Strg) Shift Key
the button
HTML will be shown HTML and remote images will be shown Plaintext will be shown

Included locales

The Add-on includes about 24 locales. Use BabelZilla to add additional locales.


Version 3.6.4

  • Supports Thunderbird 24.*

Version 3.6.3

  • Small fix for Seamonkeys Modern skin in statusbar

Version 3.6.2

  • Fixed a JS error in console, if the button is not yet added to toolbar
  • Fixed one more CSS rule for tabbar-toolbar button
  • Fixed tabbar-toolbar icon for non-aero Windows skin

Version 3.6

  • Fixed a skin/theme problem in tabbar-toolbar
  • Added a new inverted/white icon for tabbar-toolbar in aero skin

Version 3.5.1

  • Fixed a reported problem, which led to not loading/showing HTML
  • Optimized button behaviour, so that it is only activated in appropriate situations
  • Internal changes to merge and optimize JS-Code

Version 3.3.1

  • Fixed a problem leading to permanently allowed HTML

Version 3.2.3

  • Small internal changes

Version 3.2.1

  • Supports Thunderbird 3.0 - 5.* and Seamonkey 2.0 - 2.1.*
  • Added Thunderbird skin for Win7 (Aero)
  • Added skin for Seamonkey modern
  • Updated some locales
  • Small internal JavaScript fix

Version 3.0.3

  • Added a OS X Skin/Theme
  • Updated some locales
  • Replaced an outdated JS function by nsITimer

Version 3.0.1

  • Compatible with SeaMonkey 2.0.*
  • Added a SeaMonkey skin

Version 3.0

  • Compatible with Thunderbird 3.0 und up
  • Internal changes
  • Statusbar HTML info changes the possible options between mail and feeds
  • Striped the Add-on down to basic functionality

Version 2.1.1

  • Internal changes

Version 2.0.1

  • Fixed a JavaScript error/warning in Error Console ("MSG_FLAG_READ redefined").

Version 2.0

Allow HTML Temp 2.0 requires Thunderbird 2.0 or Seamonkey 1.1. If you're using an older Thunderbird/Seamonkey version, you've to use Allow HTML Temp Version 1.2.

  • Added a notification bar, which indicates HTML is allowed once
  • Added an options dialog to disable/enable the notification bar
  • Added a statusbar pane, which indicates the actual HTML mode. The HTML mode can be switched by right click > context menu.
  • Added accesskeys
  • After a successfull update of this Add-on your Webbrowser opens a window with this website with information about all/new features

Version 1.2

  • A Bug has been fixed. Up to AHT 1.0.* double clicking the extensions button "Show HTML" leads to false prefs allowing HTML allways.
  • Added some more locales

Other Add-ons by Alexander Ihrig