source: xsoft/graphweb/firefox.xml@ da314782

12.1 ken/TL2024 lazarus plabs/newcss rahul/power-profiles-daemon trunk xry111/llvm18
Last change on this file since da314782 was da314782, checked in by Douglas R. Reno <renodr@…>, 4 months ago

Firefox: drop the six dependency.

We're using a system copy of Python 3.11 now, and we don't copy the
system copy of six into the Firefox build tree anymore

  • Property mode set to 100644
File size: 23.7 KB
Line 
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7 <!ENTITY firefox-download-http "&mozilla-http;/firefox/releases/&firefox-version;esr/source/firefox-&firefox-version;esr.source.tar.xz">
8 <!ENTITY firefox-download-ftp " ">
9 <!ENTITY firefox-md5sum "5377ff4f86d3d9737acbbb271dfc30e4">
10 <!ENTITY firefox-size "488 MB">
11
12 <!-- NB with stylo, much of the build uses rust, and therefore cargo files.
13 But the extra cached cargo files, if any, seem to be minimal -->
14 <!ENTITY firefox-buildsize "6.1 GB (199 MB installed) without tests">
15 <!-- editors: with ff63 and rust-1.29, ./mach build -j4 is probably the
16 most practical way to get a timing on a machine with more cores, if taking
17 cores offline is not practical. If in doubt, round up -->
18 <!ENTITY firefox-time "11 SBU using -j8, without tests">
19]>
20
21<sect1 id="firefox" xreflabel="Firefox-&firefox-version;">
22 <?dbhtml filename="firefox.html" ?>
23
24
25<!-- indicate this is the ESR variant,
26 The point is that the stable release differs slightly.
27 <title>Firefox-&firefox-version;</title>-->
28 <title>Firefox-&firefox-version;esr</title>
29
30 <indexterm zone="firefox">
31 <primary sortas="a-Firefox">Firefox</primary>
32 </indexterm>
33
34 <sect2 role="package">
35 <title>Introduction to Firefox</title>
36
37 <para>
38 <application>Firefox</application> is a stand-alone browser based on the
39 <application>Mozilla</application> codebase.
40 </para>
41
42 &lfs120_checked;
43
44 <bridgehead renderas="sect3">Package Information</bridgehead>
45 <itemizedlist spacing="compact">
46 <listitem>
47 <para>
48 Download (HTTP): <ulink url="&firefox-download-http;"/>
49 </para>
50 </listitem>
51 <listitem>
52 <para>
53 Download (FTP): <ulink url="&firefox-download-ftp;"/>
54 </para>
55 </listitem>
56 <listitem>
57 <para>
58 Download MD5 sum: &firefox-md5sum;
59 </para>
60 </listitem>
61 <listitem>
62 <para>
63 Download size: &firefox-size;
64 </para>
65 </listitem>
66 <listitem>
67 <para>
68 Estimated disk space required: &firefox-buildsize;
69 </para>
70 </listitem>
71 <listitem>
72 <para>
73 Estimated build time: &firefox-time;
74 </para>
75 </listitem>
76 </itemizedlist>
77
78<!--<bridgehead renderas="sect3">Additional Downloads</bridgehead>
79 <itemizedlist spacing="compact">
80 <listitem>
81 <para>
82 Required patch:
83 <ulink url="&patch-root;/firefox-&firefox-version;-consolidated-1.patch"/>
84 </para>
85 </listitem>
86 <listitem>
87 <para>
88 Required patch for new <xref linkend="ffmpeg"/> API:
89 <ulink url="&patch-root;/firefox-&firefox-version;-ffmpeg_6-1.patch"/>
90 </para>
91 </listitem>
92 </itemizedlist>-->
93
94 <note>
95 <para>
96 The directory name is firefox-&firefox-version;
97 </para>
98
99 <para>
100 Extracting the tarball
101 will reset the permissions of the current directory to 0755 if you
102 have permission to do that. If you do this in a directory where
103 the sticky bit is set, such
104 as <filename class="directory">/tmp</filename> it will end with error
105 messages:
106 </para>
107
108<literallayout>tar: .: Cannot utime: Operation not permitted
109tar: .: Cannot change mode to rwxr-xr-t: Operation not permitted
110tar: Exiting with failure status due to previous errors
111</literallayout>
112
113 <para>
114 This does finish with non-zero status, but it does
115 <emphasis>NOT</emphasis> mean there is a real problem.
116 Do not untar as the <systemitem class="username">root</systemitem> user
117 in a directory where the sticky bit is set - that will unset it.
118 </para>
119
120 <para>
121 As with other large packages which use C++ (or rust), the SBU times
122 to build this vary more widely than you might expect. The build times
123 will increase significantly if your machine has to swap.
124 </para>
125
126 <para>
127 Although upstream prefer to use <application>PulseAudio</application>,
128 for the moment <application>Alsa</application> can still be used. Both
129 may need runtime configuration to get sound working.
130 </para>
131 </note>
132
133 <bridgehead renderas="sect3">Firefox Dependencies</bridgehead>
134
135 <bridgehead renderas="sect4">Required</bridgehead>
136 <para role="required">
137 <xref linkend="cbindgen"/>,
138 <xref linkend="dbus-glib"/>,
139 <xref linkend="gtk3"/>,
140 <xref linkend="libnotify"/>,
141 <xref linkend="llvm"/> (with clang, used for bindgen even if using gcc),
142 <xref linkend="nodejs"/>,
143 <xref linkend="pulseaudio"/>
144 (or
145 <xref linkend="alsa-lib"/> if you edit the mozconfig;
146 now deprecated by mozilla), in either case please read the
147 Configuration Information,
148 <xref linkend="python311"/> (built after installing <xref linkend="sqlite"/>),
149 <!--<xref linkend="six"/>,-->
150 <xref linkend="startup-notification"/>, and
151 <xref linkend="unzip"/>
152 </para>
153
154 <bridgehead renderas="sect4">Recommended</bridgehead>
155 <para role="recommended">
156 <xref linkend="icu"/>,
157 <xref linkend="libevent"/>,
158 <xref linkend="libvpx"/>,
159 <xref linkend="libwebp"/>,
160 <xref linkend="nasm"/>, and
161 <xref linkend="nss"/>
162 </para>
163
164 <note>
165 <para>
166 If you don't install recommended dependencies, then internal copies of
167 those packages will be used. They might be tested to work, but they can
168 be out of date or contain security holes.
169 </para>
170 </note>
171
172 <bridgehead renderas="sect4">Optional</bridgehead>
173 <para role="optional">
174 <xref linkend="curl"/>,
175 <xref linkend="doxygen"/>,
176 <xref role="runtime" linkend="ffmpeg"/> (runtime, to play mov, mp3 or mp4 files),
177 <xref linkend="liboauth"/>,
178 <xref role="runtime" linkend="pciutils"/> (runtime),
179 <xref linkend="valgrind"/>,
180 <xref linkend="wget"/>,
181 <xref linkend="wireless_tools"/>,
182 <xref linkend="yasm"/>,
183 <ulink url="https://github.com/libproxy/libproxy">libproxy</ulink>
184 </para>
185
186 <para condition="html" role="usernotes">
187 Editor Notes: <ulink url="&blfs-wiki;/firefox"/>
188 </para>
189 </sect2>
190
191 <sect2 role="installation">
192 <title>Installation of Firefox</title>
193
194 <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=1859752
195 https://hg.mozilla.org/try/rev/d5f3b0c4f08a -->
196 <para>
197 If building with system ICU, adapt the line break mapping for ICU
198 74 or later:
199 </para>
200
201<screen><userinput>(for i in {43..47}; do
202 sed '/ZWJ/s/}/,CLASS_CHARACTER&amp;/' -i intl/lwbrk/LineBreaker.cpp || exit $?
203 done)</userinput></screen>
204
205 <para>
206 The configuration of <application>Firefox</application> is accomplished
207 by creating a <filename>mozconfig</filename> file containing the desired
208 configuration options. A default <filename>mozconfig</filename> is
209 created below. To see the entire list of available configuration options
210 (and an abbreviated description of some of them), issue <command>./mach
211 configure -- --help | less</command>. You may also
212 wish to review the entire file and uncomment any other desired options.
213 Create the file by issuing the following command:
214 </para>
215
216<screen><userinput>cat &gt; mozconfig &lt;&lt; "EOF"
217<literal># If you have a multicore machine, all cores will be used by default.
218
219# If you have installed (or will install) wireless-tools, and you wish
220# to use geolocation web services, comment out this line
221ac_add_options --disable-necko-wifi
222
223# API Keys for geolocation APIs - necko-wifi (above) is required for MLS
224# Uncomment the following line if you wish to use Mozilla Location Service
225#ac_add_options --with-mozilla-api-keyfile=$PWD/mozilla-key
226
227# Uncomment the following line if you wish to use Google's geolocation API
228# (needed for use with saved maps with Google Maps)
229#ac_add_options --with-google-location-service-api-keyfile=$PWD/google-key
230
231# startup-notification is required since firefox-78
232
233# Uncomment the following option if you have not installed PulseAudio and
234# want to use alsa instead
235#ac_add_options --enable-audio-backends=alsa
236
237# Comment out following options if you have not installed
238# recommended dependencies:
239ac_add_options --with-system-icu
240ac_add_options --with-system-libevent
241ac_add_options --with-system-libvpx
242ac_add_options --with-system-nspr
243ac_add_options --with-system-nss
244ac_add_options --with-system-webp
245
246# Unlike with thunderbird, although using the gold linker can
247# save four megabytes in the installed file it does not make
248# the build faster.
249
250# The libdav1d library (av1 decoder) requires nasm. Uncomment this
251# if nasm has not been installed. Do not uncomment this if you have
252# ffmpeg installed.
253#ac_add_options --disable-av1
254
255# You cannot distribute the binary if you do this.
256ac_add_options --enable-official-branding
257
258# Stripping is now enabled by default.
259# Uncomment these lines if you need to run a debugger:
260#ac_add_options --disable-strip
261#ac_add_options --disable-install-strip
262
263# Disabling debug symbols makes the build much smaller and a little
264# faster. Comment this if you need to run a debugger. Note: This is
265# required for compilation on i686.
266ac_add_options --disable-debug-symbols
267<!-- With Firefox ESR 128 we'd replace the following part with
268"- -enable-elf-hack=relr", or remove it if relr becomes the default. -->
269# The elf-hack is reported to cause failed installs (after successful builds)
270# on some machines. It is supposed to improve startup time and it shrinks
271# libxul.so by a few MB. With recent Binutils releases the linker already
272# supports a much safer and generic way for this.
273ac_add_options --disable-elf-hack
274export LDFLAGS="$LDFLAGS -Wl,-z,pack-relative-relocs"
275
276# The BLFS editors recommend not changing anything below this line:
277ac_add_options --prefix=/usr
278ac_add_options --enable-application=browser
279ac_add_options --disable-crashreporter
280ac_add_options --disable-updater
281
282# Enabling the tests will use a lot more space and significantly
283# increase the build time, for no obvious benefit.
284ac_add_options --disable-tests
285
286# This enables SIMD optimization in the shipped encoding_rs crate.
287ac_add_options --enable-rust-simd
288
289ac_add_options --enable-system-ffi
290ac_add_options --enable-system-pixman
291
292ac_add_options --with-system-jpeg
293ac_add_options --with-system-png
294ac_add_options --with-system-zlib
295
296# Sandboxing works well on x86_64 but might cause issues on other
297# platforms. If not on x86_64, e.g. i686, it is recommended to
298# uncomment the following switch.
299#ac_add_options --disable-sandbox
300
301# Using sandboxed wasm libraries has been moved to all builds instead
302# of only mozilla automation builds. It requires extra llvm packages
303# and was reported to seriously slow the build. Disable it.
304ac_add_options --without-wasm-sandboxed-libraries
305
306# The following option unsets Telemetry Reporting. With the Addons Fiasco,
307# Mozilla was found to be collecting user's data, including saved passwords and
308# web form data, without users consent. Mozilla was also found shipping updates
309# to systems without the user's knowledge or permission.
310# As a result of this, use the following command to permanently disable
311# telemetry reporting in Firefox.
312unset MOZ_TELEMETRY_REPORTING
313
314mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/firefox-build-dir</literal>
315EOF</userinput></screen>
316
317 <para>
318 Compile <application>Firefox</application> by issuing the following
319 commands:
320 </para>
321<!-- Not needed with clang. Upstream bug at
322 https://bugzilla.mozilla.org/show_bug.cgi?id=1729459
323
324 <para>
325 If building on a 32 bit machine, the following sed works around
326 an issue with an incompatible <quote>double</quote> type in one
327 header file:
328 </para>
329
330<screen><userinput>case "$(uname -m)" in
331 i?86) sed -e '/typedef[ ]*double/s/double/long double/' \
332 -i modules/fdlibm/src/math_private.h ;;
333esac</userinput></screen>
334-->
335 <para>
336 If the geolocation APIs are needed:
337 </para>
338
339 <note>
340 <para>
341 <!-- Taken from Arch Linux - an immensely helpful link - Thanks -->
342 The Google and Mozilla API Keys below are specific to LFS. If using
343 these instructions for another distro, or if you intend to distribute
344 binary copies of the software using these instructions, please obtain
345 your own keys following the instructions located at
346 <ulink url="https://www.chromium.org/developers/how-tos/api-keys"/> and
347 <ulink url="https://location.services.mozilla.com/api"/> respectively.
348 <!-- BLFS Devs, register an account at Google with your
349 @linuxfromscratch.org email address, and I'll make you an administrator
350 for the 'Google APIs for LFS' project (where the API and OAuth keys
351 were created for use in the book).-->
352 </para>
353 </note>
354
355<screen><userinput>echo "AIzaSyDxKL42zsPjbke5O8_rPVpVrLrJ8aeE9rQ" > google-key
356echo "613364a7-9418-4c86-bcee-57e32fd70c23" > mozilla-key</userinput></screen>
357
358 <note>
359 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
360 href="../../xincludes/mozshm.xml"/>
361 </note>
362
363<!--<para>
364 Fix building Firefox with Clang 16 or C++ headers from GCC 13.
365 And, work around a build failure with Rustc-1.70.0:
366 </para>
367
368<screen><userinput remap="pre">patch -Np1 -i ../firefox-&firefox-version;-consolidated-1.patch</userinput></screen>
369
370 <para>
371 Apply the following patch so that firefox is able to play H.264 videos:
372 </para>
373
374<screen><userinput remap="pre">patch -Np1 -i ../firefox-&firefox-version;-ffmpeg_6-1.patch</userinput></screen>-->
375
376 <para>
377 Now invoke the Python <command>mach</command> script to compile the package.
378 </para>
379
380<screen><userinput>export MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE=none &amp;&amp;
381export MOZBUILD_STATE_PATH=${PWD}/mozbuild &amp;&amp;
382export PYTHON311=/opt/python3.11/bin/python3.11 &amp;&amp;
383$PYTHON311 ./mach configure &amp;&amp;
384$PYTHON311 ./mach build</userinput></screen>
385
386 <para>
387 The <filename>mozconfig</filename> above disables the tests because
388 they use a lot more time and disk space for no obvious benefit. If
389 you have nevertheless enabled them, you can run the tests by executing
390 <command>./mach gtest</command>. This will require a network connection,
391 and to be run from within an Xorg session - there is a popup dialog
392 when it fails to connect to ALSA (that does not create a failed test).
393 One or two tests will fail. To see the details of the failure(s) you
394 will need to log the output from that command so that you can review it.
395 </para>
396
397 <para>
398 Now, as the <systemitem class="username">root</systemitem> user:
399 </para>
400
401<screen role="root"><userinput>export MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE=none &amp;&amp;
402export PYTHON311=/opt/python3.11/bin/python3.11 &amp;&amp;
403$PYTHON311 ./mach install</userinput></screen>
404
405 <para>
406 Empty the environment variables which were set above:
407 </para>
408
409<screen><userinput>unset MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE
410unset MOZBUILD_STATE_PATH
411unset PYTHON311</userinput></screen>
412
413 </sect2>
414
415 <sect2 role="commands">
416 <title>Command Explanations</title>
417
418 <para>
419 <command>export MOZBUILD_STATE_PATH=${PWD}/mozbuild</command>: The build
420 tells you that it intends to create <filename
421 class="directory">~/.mozbuild</filename>, and offer you an option to
422 press &lt;ENTER&gt; to accept this, or Ctrl-C to cancel and restart the
423 build after specifying the directory. In practice, the message may not
424 appear until after &lt;ENTER&gt; is keyed, i.e. the build stalls.
425 </para>
426
427 <para>
428 That directory is used for a (probably random) telemetry identifier.
429 Creating this directory within the build directory and deleting it after the
430 installation prevents it being used.
431 </para>
432
433 <para>
434 <command>MACH_BUILD_PYTHON_NATIVE_PACKAGE_SOURCE=none</command>: Use the
435 system python to create a virtual environment for <command>mach</command>
436 without downloading any python wheels and without using the system python modules.
437 This prevents version mismatches between system modules and bundled ones.
438 </para>
439
440 <para>
441 <command>./mach configure</command>: This validates the supplied
442 dependencies and the <filename>mozconfig</filename>.
443 </para>
444
445 <para>
446 <option>./mach build --verbose</option>: Use this alternative if you
447 need details of which files are being compiled, together with any C or
448 C++ flags being used. But do not add '--verbose' to the install command
449 since it is not accepted there.
450 </para>
451
452 <para>
453 <option>./mach build -jN</option>: The build should, by default, use
454 all the online CPU cores. If using all the cores causes the build to swap
455 because you have insufficient memory, using fewer cores can be faster.
456 </para>
457
458 <para>
459 <option><envar>CC=gcc CXX=g++</envar></option>: BLFS used to
460 prefer to use gcc and g++ instead of upstream's defaults of the
461 <application>clang</application> programs. With the release of
462 gcc-12 the build takes longer with gcc and g++, primarily because
463 of extra warnings, and is bigger. Set these environment variables
464 <emphasis>before you run the configure script</emphasis>
465 if you wish to continue to use gcc, g++. Building
466 with GCC on i?86 is currently broken.
467 </para>
468
469 </sect2>
470
471 <sect2 role="configuration">
472 <title>Configuring Firefox</title>
473
474 <para>
475 If you use a desktop environment like <application>Gnome</application> or
476 <application>KDE</application> you may want to create a
477 <filename>firefox.desktop</filename> file so that
478 <application>Firefox</application> appears in the panel's menus.
479 As the &root; user:
480 </para>
481
482<screen role="root"><userinput>mkdir -pv /usr/share/applications &amp;&amp;
483mkdir -pv /usr/share/pixmaps &amp;&amp;
484
485MIMETYPE="text/xml;text/mml;text/html;" &amp;&amp;
486MIMETYPE+="application/xhtml+xml;application/vnd.mozilla.xul+xml;" &amp;&amp;
487MIMETYPE+="x-scheme-handler/http;x-scheme-handler/https" &amp;&amp;
488
489cat &gt; /usr/share/applications/firefox.desktop &lt;&lt; EOF &amp;&amp;
490<literal>[Desktop Entry]
491Encoding=UTF-8
492Name=Firefox Web Browser
493Comment=Browse the World Wide Web
494GenericName=Web Browser
495Exec=firefox %u
496Terminal=false
497Type=Application
498Icon=firefox
499Categories=GNOME;GTK;Network;WebBrowser;
500MimeType=$MIMETYPE
501StartupNotify=true</literal>
502EOF
503
504unset MIMETYPE &amp;&amp;
505
506ln -sfv /usr/lib/firefox/browser/chrome/icons/default/default128.png \
507 /usr/share/pixmaps/firefox.png</userinput></screen>
508
509 <sect3><title>Configuration Information</title>
510
511 <para>
512 The application settings for firefox are accessible by keying
513 <command>about:config</command> in the address bar.
514 </para>
515
516 <para>
517 Occasionally, getting working sound in
518 <application>firefox</application> can be a problem. Although upstream
519 prefers pulseaudio,
520 on balance using <application>Alsa</application> may be easier.
521 </para>
522
523 <para>
524 If you enabled <application>Alsa</application> for sound, you may need
525 to alter one variable to get working sound. If you run
526 <command>firefox</command> from a terminal and try to play something
527 with sound you might encounter error messages like:
528 </para>
529
530 <para>
531 <literal>Sandbox: seccomp sandbox violation: pid 3941, tid 4030,
532 syscall 16, args 48 2147767296 139909894784796 0 0 0.</literal>
533 </para>
534
535 <para>
536 That was on x86_64, on i686 the syscall number is 54. To allow this
537 syscall, in <command>about:config</command> change
538 <command>security.sandbox.content.syscall_whitelist</command> to 16
539 (or 54 if using i686).
540 </para>
541
542 <para>
543 If you use <command>pulseaudio</command> in a Desktop Environment, it
544 might already be started by that DE. But if it is not, although
545 firefox-57 managed to start it, firefox-58 did not. If you run
546 <command>firefox</command> from a terminal and this problem is present,
547 trying to play sound will
548 encounter error messages warning <literal>Can't get cubeb
549 context!</literal>
550 </para>
551
552 <para>
553 The fix for this is to close firefox, start pulseaudio to check it
554 does start (if not, read the information on Configuring in <xref
555 linkend="pulseaudio"/>) and restart firefox to check it is working.
556 If it now works, add the following to your <filename>~/.xinitrc</filename>:
557<phrase revision="sysv">
558<literal>pulseaudio --verbose --log-target=syslog&amp;</literal></phrase>
559<phrase revision="systemd">
560<literal>pulseaudio --verbose --log-target=journald&amp;</literal></phrase>
561 (unfortunately, on some systems this does not work).
562 </para>
563
564 <para>
565 You may wish to use multiple profiles within firefox. To do that, invoke
566 firefox as <command>firefox --ProfileManager</command>. You can also
567 check which profile is currently in use from
568 <command>about:profiles</command>.
569 </para>
570
571 <para>
572 Although WebRender (using the GPU for compositing) is not used by
573 default, it now appears to work well on supported hardware (ATI, Nvidia
574 and Intel GPUs with Mesa-18 or later). For an explanation, please see
575 <ulink
576 url="https://hacks.mozilla.org/2017/10/the-whole-web-at-maximum-fps-how-webrender-gets-rid-of-jank/">hacks.mozilla.org</ulink>.
577 The only downside seems to be that on a machine with limited RAM it might
578 use more RAM.
579 </para>
580
581 <para>
582 To check if WebRender is being used, look in about:support. In the Graphics
583 section, Compositing will either show 'Basic' (i.e. not in use) or
584 'WebRender'. To enable it, go to about:config and change gfx.webrender.all
585 to True. You will need to restart firefox.
586 </para>
587
588 <para>
589 It may be useful to mention the processes from firefox which can appear in
590 <command>top</command> - as well as firefox itself, there may be multiple
591 Web Content processes, and now an RDD Process (Remote Data Decoder) which
592 appears when playing web videos encoded with av1 (libdav1d). If WebRender
593 has been enabled, a GPU Process will also appear when firefox has to
594 repaint (e.g. scrolling, opening a new tab, or playing a video).
595 </para>
596
597 </sect3>
598 </sect2>
599
600 <sect2 role="content">
601 <title>Contents</title>
602
603 <segmentedlist>
604 <segtitle>Installed Programs</segtitle>
605 <segtitle>Installed Libraries</segtitle>
606 <segtitle>Installed Directory</segtitle>
607
608 <seglistitem>
609 <seg>
610 firefox
611 </seg>
612 <seg>
613 Numerous libraries, browser components, plugins, extensions, and
614 helper modules installed in /usr/lib/firefox
615 </seg>
616 <seg>
617 /usr/lib/firefox
618 </seg>
619 </seglistitem>
620 </segmentedlist>
621
622 <variablelist>
623 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
624 <?dbfo list-presentation="list"?>
625 <?dbhtml list-presentation="table"?>
626
627 <varlistentry id="firefox-prog">
628 <term><command>firefox</command></term>
629 <listitem>
630 <para>
631 is a <application>GTK+-3</application> internet browser that uses
632 the Mozilla Gecko rendering engine
633 </para>
634 <indexterm zone="firefox firefox-prog">
635 <primary sortas="b-firefox">firefox</primary>
636 </indexterm>
637 </listitem>
638 </varlistentry>
639
640 </variablelist>
641
642 </sect2>
643
644</sect1>
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