Also bei mir klappts nach dem Howto..
Guck mal bei Bearbeiten → Einstellungen → Downloads → Download Aktionen und schau ob bei pdf der acrobate reader eingetragen ist.
Wenn das nicht so ist, dann weiß ich nicht was falsch gelaufen ist, aber in meiner ~/.mozilla/firefox/pluginreg.dat steht der mit drin:
Generated File. Do not edit.
[HEADER]
Version:0.08:$
[PLUGINS]
/home/sven/.mozilla/plugins/libflashplayer.so:$
:$
1144138785000:1:7:$
Shockwave Flash 7.0 r63:$
Shockwave Flash:$
2
0:application/x-shockwave-flash:Shockwave Flash:swf:$
1:application/futuresplash:FutureSplash Player:spl:$
/usr/lib/Adobe/Acrobat7.0/Browser/intellinux/nppdf.so:$
:$
1122502244000:1:5:$
The Adobe Reader plugin is used to enable viewing of PDF and FDF files from within the browser.:$
Adobe Reader 7.0:$
5
0:application/pdf:Portable Document Format:pdf:$
1:application/vnd.fdf:Acrobat Forms Data Format:fdf:$
2:application/vnd.adobe.xfdf:XML Version of Acrobat Forms Data Format:xfdf:$
3:application/vnd.adobe.xdp+xml:Acrobat XML Data Package:xdp:$
4:application/vnd.adobe.xfd+xml:Adobe FormFlow99 Data File:xfd:$
/usr/lib/j2se/1.4/jre/plugin/i386/mozilla/libjavaplugin_oji.so:$
:$
1127162686000:1:5:$
<a href="http://www.blackdown.org/java-linux.html">Blackdown Java-Linux</a> Java(TM) Plug-in 1.4.2:$
Java(TM) Plug-in Blackdown-1.4.2-02:$
45
0:application/x-java-vm:Java::$
1:application/x-java-applet:Java::$
2:application/x-java-applet;version=1.1:Java::$
3:application/x-java-applet;version=1.1.1:Java::$
4:application/x-java-applet;version=1.1.2:Java::$
5:application/x-java-applet;version=1.1.3:Java::$
6:application/x-java-applet;version=1.2:Java::$
7:application/x-java-applet;version=1.2.1:Java::$
8:application/x-java-applet;version=1.2.2:Java::$
9:application/x-java-applet;version=1.3:Java::$
10:application/x-java-applet;version=1.3.1:Java::$
11:application/x-java-applet;version=1.4:Java::$
12:application/x-java-applet;version=1.4.1:Java::$
13:application/x-java-applet;version=1.4.2:Java::$
14:application/x-java-applet;jpi-version=1.4.2:Java::$
15:application/x-java-applet;jpi-version=1.4.2_01:Java::$
16:application/x-java-applet;jpi-version=1.4.2_02:Java::$
17:application/x-java-applet;jpi-version=1.4.2_03:Java::$
18:application/x-java-applet;jpi-version=1.4.2_04:Java::$
19:application/x-java-applet;jpi-version=1.4.2_05:Java::$
20:application/x-java-applet;jpi-version=1.4.2_06:Java::$
21:application/x-java-applet;jpi-version=1.4.2_07:Java::$
22:application/x-java-applet;jpi-version=1.4.2_08:Java::$
23:application/x-java-bean:Java::$
24:application/x-java-bean;version=1.1:Java::$
25:application/x-java-bean;version=1.1.1:Java::$
26:application/x-java-bean;version=1.1.2:Java::$
27:application/x-java-bean;version=1.1.3:Java::$
28:application/x-java-bean;version=1.2:Java::$
29:application/x-java-bean;version=1.2.1:Java::$
30:application/x-java-bean;version=1.2.2:Java::$
31:application/x-java-bean;version=1.3:Java::$
32:application/x-java-bean;version=1.3.1:Java::$
33:application/x-java-bean;version=1.4:Java::$
34:application/x-java-bean;version=1.4.1:Java::$
35:application/x-java-bean;version=1.4.2:Java::$
36:application/x-java-bean;jpi-version=1.4.2:Java::$
37:application/x-java-bean;jpi-version=1.4.2_01:Java::$
38:application/x-java-bean;jpi-version=1.4.2_02:Java::$
39:application/x-java-bean;jpi-version=1.4.2_03:Java::$
40:application/x-java-bean;jpi-version=1.4.2_04:Java::$
41:application/x-java-bean;jpi-version=1.4.2_05:Java::$
42:application/x-java-bean;jpi-version=1.4.2_06:Java::$
43:application/x-java-bean;jpi-version=1.4.2_07:Java::$
44:application/x-java-bean;jpi-version=1.4.2_08:Java::$
/usr/lib/firefox/plugins/libtotem_mozilla.so:$
:$
1147634228000:1:5:$
The <a href="http://www.gnome.org/projects/totem/">Totem</a> 1.4.1 plugin handles video and audio streams.:$
Totem Mozilla Plugin:$
9
0:video/quicktime:QT-Video:mov:$
1:application/x-mplayer2:AVI-Video:avi, wma, wmv:$
2:video/mpeg:MPEG-Video:mpg, mpeg, mpe:$
3:video/x-ms-asf-plugin:ASF-Video:asf, wmv:$
4:video/x-ms-wmv:WMV-Video:wmv:$
5:video/x-wmv:WMV-Video:wmv:$
6:application/ogg:Ogg multimedia:ogg:$
7:video/divx:AVI-Video:divx:$
8:audio/wav:WAV-Audio:wav:$
Das meiste wirst du wohl nicht brauchen, aber am Anfang steht was zu pdf
greets sven