source: archive/firefox-legacy.xml

trunk
Last change on this file was 3f2db3a6, checked in by Pierre Labastie <pierre.labastie@…>, 17 months ago

Remove sect1info tags

They only contain a date tag that is nowhere used.

  • Property mode set to 100644
File size: 24.3 KB
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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/&JS78-version;esr/source/firefox-&JS78-version;esr.source.tar.xz">
8 <!ENTITY firefox-download-ftp " ">
9 <!ENTITY firefox-md5sum "453c90444bad8702fd08b71213ab2cbc">
10 <!ENTITY firefox-size "316 MB">
11 <!-- NB with stylo, much of the build uses rust, and therefore cargo files.
12 But the extra cached cargo files, if any, seem to be minimal -->
13 <!ENTITY firefox-buildsize "5.2 GB (186 MB installed) without tests">
14 <!-- editors: with ff63 and rust-1.29, ./mach build -j4 is probably the
15 most practical way to get a timing on a machine with more cores, if taking
16 cores offline is not practical. If in doubt, round up -->
17 <!ENTITY firefox-time "28 SBU (on a 4-core machine) without tests">
18]>
19
20<sect1 id="firefox-legacy" xreflabel="Firefox-&JS78-version; Legacy">
21 <?dbhtml filename="firefox-legacy.html" ?>
22
23
24 <title>Firefox-&JS78-version;</title>
25
26 <indexterm zone="firefox-legacy">
27 <primary sortas="a-Firefox">Firefox Legacy</primary>
28 </indexterm>
29
30 <sect2 role="package">
31 <title>Introduction to Firefox Legacy</title>
32
33 <para>
34 <application>Firefox</application> is a stand-alone browser based on the
35 <application>Mozilla</application> codebase.
36 </para>
37
38 <para>This package is known to build and work properly using an LFS-10.1
39 platform but cannot be built on systems using glibc-2.34.</para>
40
41 <bridgehead renderas="sect3">Package Information</bridgehead>
42 <itemizedlist spacing="compact">
43 <listitem>
44 <para>
45 Download (HTTP): <ulink url="&firefox-download-http;"/>
46 </para>
47 </listitem>
48 <listitem>
49 <para>
50 Download (FTP): <ulink url="&firefox-download-ftp;"/>
51 </para>
52 </listitem>
53 <listitem>
54 <para>
55 Download MD5 sum: &firefox-md5sum;
56 </para>
57 </listitem>
58 <listitem>
59 <para>
60 Download size: &firefox-size;
61 </para>
62 </listitem>
63 <listitem>
64 <para>
65 Estimated disk space required: &firefox-buildsize;
66 </para>
67 </listitem>
68 <listitem>
69 <para>
70 Estimated build time: &firefox-time;
71 </para>
72 </listitem>
73 </itemizedlist>
74
75<!--<bridgehead renderas="sect3">Additional Downloads</bridgehead>
76 <itemizedlist spacing="compact">
77 <listitem>
78 <para>
79 Required patch:
80 <ulink url="&patch-root;/firefox-&firefox-version;esr-rust1520-1.patch"/>
81 </para>
82 </listitem>
83 </itemizedlist>-->
84
85 <warning>
86 <para>
87 This is the old series of firefox ESR releases, the final release is
88 planned to be 78.15.0 in October 2021. This page is expected to be
89 removed in November 2021 when firefox-91.3 is released.
90 </para>
91
92 <para>
93 If you are using glibc-2.34 or later, this old version of firefox will
94 not be usable and you should use <xref linkend="firefox"/>.
95 </para>
96
97 <para>
98 There are only two reasons to use this version: either you want to use
99 ftp from the browser and do not yet have a workaround, or you have a
100 system which for unexplained reasons cannot compile current firefox
101 (there is now a patch to work around that).
102 </para>
103 </warning>
104
105 <note>
106 <para>
107 The directory name is firefox-&JS78-version;
108 </para>
109
110 <para>
111 Extracting the tarball
112 will reset the permissions of the current directory to 0755 if you
113 have permission to do that. If you do this in a directory where
114 the sticky bit is set, such
115 as <filename class="directory">/tmp</filename> it will end with error
116 messages:
117 </para>
118
119<literallayout>tar: .: Cannot utime: Operation not permitted
120tar: .: Cannot change mode to rwxr-xr-t: Operation not permitted
121tar: Exiting with failure status due to previous errors
122</literallayout>
123
124 <para>
125 This does finish with non-zero status, but it does
126 <emphasis>NOT</emphasis> mean there is a real problem.
127 Do not untar as the <systemitem class="username">root</systemitem> user
128 in a directory where the sticky bit is set - that will unset it.
129 </para>
130
131 <para>
132 As with other large packages which use C++ (or rust), the SBU times
133 to build this vary more widely than you might expect. The build times
134 will increase significantly if your machine has to swap.
135 </para>
136
137 <para>
138 Although upstream prefer to use <application>PulseAudio</application>,
139 for the moment <application>Alsa</application> can still be used. Both
140 may need runtime configuration to get sound working.
141 </para>
142 </note>
143
144 <bridgehead renderas="sect3">Firefox Dependencies</bridgehead>
145
146 <bridgehead renderas="sect4">Required</bridgehead>
147 <para role="required">
148 <xref linkend="autoconf213"/>,
149 <xref linkend="cbindgen"/>,
150 <xref linkend="dbus-glib"/>,
151 both <xref linkend="gtk3"/> and
152 <xref linkend="gtk2"/>,
153 <xref linkend="libnotify"/>,
154 <xref linkend="llvm"/> (clang, used for bindgen even if using gcc),
155 <xref linkend="nodejs"/>,
156 <xref linkend="nss"/>,
157 <xref linkend="pulseaudio"/>
158 (or
159 <xref linkend="alsa-lib"/> if you edit the mozconfig;
160 now deprecated by mozilla), in either case please read the
161 Configuration Information,
162 <!-- rustc is required by cbindgen so not needed here
163 <xref linkend="rust"/>,-->
164 <xref linkend="python3"/> (rebuilt after installing <xref linkend="sqlite"/>),
165 <xref linkend="startup-notification"/>,
166 <xref linkend="unzip"/>,
167 <xref linkend="yasm"/>, and
168 <xref linkend="zip"/>
169 </para>
170
171 <bridgehead renderas="sect4">Recommended</bridgehead>
172 <para role="recommended">
173 <xref linkend="icu"/>,
174 <xref linkend="libevent"/>,
175 <xref linkend="libwebp"/>,
176 <xref linkend="nasm"/>
177 </para>
178
179 <note>
180 <para>
181 If you don't install recommended dependencies, then internal copies of
182 those packages will be used. They might be tested to work, but they can
183 be out of date or contain security holes.
184 </para>
185 </note>
186
187 <bridgehead renderas="sect4">Optional</bridgehead>
188 <para role="optional">
189 <xref linkend="curl"/>,
190 <xref linkend="doxygen"/>,
191 <xref role="runtime" linkend="ffmpeg"/> (runtime, to play mov, mp3 or mp4 files),
192 <!-- <phrase revision="sysv"><ulink url="https://sourceforge.net/projects/liboauth/files/">liboauth</ulink></phrase> -->
193 <xref linkend="liboauth"/>,
194 <xref linkend="openjdk"/>,
195 <xref linkend="valgrind"/>,
196 <xref linkend="wget"/>,
197 <xref linkend="wireless_tools"/>,
198 <ulink url="https://github.com/libproxy/libproxy">libproxy</ulink>
199 </para>
200
201 <para condition="html" role="usernotes">
202 User Notes: <ulink url="&blfs-wiki;/firefox"/>
203 </para>
204 </sect2>
205
206 <sect2 role="installation">
207 <title>Installation of Firefox Legacy</title>
208
209 <para>
210 The configuration of <application>Firefox</application> is accomplished
211 by creating a <filename>mozconfig</filename> file containing the desired
212 configuration options. A default <filename>mozconfig</filename> is
213 created below. To see the entire list of available configuration options
214 (and an abbreviated description of some of them), issue <command>./mach
215 configure &amp;&amp; ./configure --help | less</command>. You may also
216 wish to review the entire file and uncomment any other desired options.
217 Create the file by issuing the following command:
218 </para>
219
220<screen><userinput>cat &gt; mozconfig &lt;&lt; "EOF"
221<literal># If you have a multicore machine, all cores will be used by default.
222
223# If you have installed (or will install) wireless-tools, and you wish
224# to use geolocation web services, comment out this line
225ac_add_options --disable-necko-wifi
226
227# API Keys for geolocation APIs - necko-wifi (above) is required for MLS
228# Uncomment the following line if you wish to use Mozilla Location Service
229#ac_add_options --with-mozilla-api-keyfile=$PWD/mozilla-key
230
231# Uncomment the following line if you wish to use Google's geolocaton API
232# (needed for use with saved maps with Google Maps)
233#ac_add_options --with-google-location-service-api-keyfile=$PWD/google-key
234
235# startup-notification is required since firefox-78
236
237# Uncomment the following option if you have not installed PulseAudio
238#ac_add_options --disable-pulseaudio
239# or uncomment this if you installed alsa-lib instead of PulseAudio
240#ac_add_options --enable-alsa
241
242# Comment out following options if you have not installed
243# recommended dependencies:
244ac_add_options --with-system-libevent
245ac_add_options --with-system-webp
246ac_add_options --with-system-nspr
247ac_add_options --with-system-nss
248ac_add_options --with-system-icu
249
250# Do not specify the gold linker which is not the default. It will take
251# longer and use more disk space when debug symbols are disabled.
252
253# libdavid (av1 decoder) requires nasm. Uncomment this if nasm
254# has not been installed.
255#ac_add_options --disable-av1
256
257# You cannot distribute the binary if you do this
258ac_add_options --enable-official-branding
259
260# Stripping is now enabled by default.
261# Uncomment these lines if you need to run a debugger:
262#ac_add_options --disable-strip
263#ac_add_options --disable-install-strip
264
265# Disabling debug symbols makes the build much smaller and a little
266# faster. Comment this if you need to run a debugger. Note: This is
267# required for compilation on i686.
268ac_add_options --disable-debug-symbols
269
270# The elf-hack is reported to cause failed installs (after successful builds)
271# on some machines. It is supposed to improve startup time and it shrinks
272# libxul.so by a few MB - comment this if you know your machine is not affected.
273ac_add_options --disable-elf-hack
274
275# The BLFS editors recommend not changing anything below this line:
276ac_add_options --prefix=/usr
277ac_add_options --enable-application=browser
278ac_add_options --disable-crashreporter
279ac_add_options --disable-updater
280# enabling the tests will use a lot more space and significantly
281# increase the build time, for no obvious benefit.
282ac_add_options --disable-tests
283
284# The default level of optimization again produces a working build with gcc.
285ac_add_options --enable-optimize
286
287ac_add_options --enable-system-ffi
288ac_add_options --enable-system-pixman
289
290# --with-system-bz2 was removed in firefox-78
291ac_add_options --with-system-jpeg
292ac_add_options --with-system-png
293ac_add_options --with-system-zlib
294
295# The following option unsets Telemetry Reporting. With the Addons Fiasco,
296# Mozilla was found to be collecting user's data, including saved passwords and
297# web form data, without users consent. Mozilla was also found shipping updates
298# to systems without the user's knowledge or permission.
299# As a result of this, use the following command to permanently disable
300# telemetry reporting in Firefox.
301unset MOZ_TELEMETRY_REPORTING
302
303mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/firefox-build-dir</literal>
304EOF</userinput></screen>
305
306 <para>
307 Compile <application>Firefox</application> by issuing the following
308 commands:
309 </para>
310
311<!--<para>
312 Apply a patch that prevent a crash when opening HTML videos if
313 compiling against rust-1.52.0 or higher:
314 </para>
315
316<screen><userinput>patch -Np1 -i ../firefox-&firefox-version;esr-rust1520-1.patch</userinput></screen>-->
317
318 <para>
319 In the esr version of firefox-78, the code to ensure that add-ons
320 are signed by the trusted root has been disabled, presumably for
321 organizations which require their own add-ons. To enable it as an
322 added security measure issue the following command:
323 </para>
324
325<screen><userinput>sed -e 's/Disable/Enable/' \
326 -e '/^MOZ_REQUIRE_SIGNING/s/0/1/' \
327 -i build/mozconfig.common</userinput></screen>
328
329 <para>
330 If the geolocation APIs are needed:
331 </para>
332
333 <note>
334 <para>
335 <!-- Taken from Arch Linux - an immensely helpful link - Thanks -->
336 The Google and Mozilla API Keys below are specific to LFS. If using
337 these instructions for another distro, or if you intend to distribute
338 binary copies of the software using these instructions, please obtain
339 your own keys following the instructions located at
340 <ulink url="http://www.chromium.org/developers/how-tos/api-keys"/> and
341 <ulink url="https://location.services.mozilla.com/api"/> respectively.
342 <!-- BLFS Devs, register an account at Google with your
343 @linuxfromscratch.org email address, and I'll make you an administrator
344 for the 'Google APIs for LFS' project (where the API and OAuth keys
345 were created for use in the book).-->
346 </para>
347 </note>
348
349<screen><userinput>echo "AIzaSyDxKL42zsPjbke5O8_rPVpVrLrJ8aeE9rQ" > google-key
350echo "613364a7-9418-4c86-bcee-57e32fd70c23" > mozilla-key</userinput></screen>
351
352 <note>
353
354 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
355 href="../../xincludes/mozshm.xml"/>
356
357 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
358 href="../../xincludes/mozmach.xml"/>
359
360 </note>
361 <!--
362 <para>
363 If you are building on i686, apply a fix to prevent Internal Compiler
364 Errors in GCC-7+:
365 </para>
366
367<screen><userinput remap="pre">case $(uname -m) in
368 i?86) sed -i "562 s/mips64/i386/" gfx/skia/skia/third_party/skcms/src/Transform_inl.h ;;
369esac</userinput></screen>
370 -->
371<!--<para>
372 Apply a patch to allow this to be compiled with <xref linkend="rust"/>:
373 </para>
374
375<screen><userinput remap="pre">patch -p1 -i ../firefox-&firefox-version;esr-rustc1470-1.patch</userinput></screen>-->
376
377 <para>
378 Now invoke the Python script to compile the package.
379 </para>
380
381<screen><userinput>export CC=gcc CXX=g++ &amp;&amp;
382export MOZBUILD_STATE_PATH=${PWD}/mozbuild &amp;&amp;
383./mach configure &amp;&amp;
384./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>./mach install</userinput></screen>
402
403 <para>
404 Set environment variables back to their values:
405 </para>
406
407<screen><userinput>unset CC CXX MOZBUILD_STATE_PATH</userinput></screen>
408
409 </sect2>
410
411 <sect2 role="commands">
412 <title>Command Explanations</title>
413
414<!--<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
415 href="../../xincludes/SIOCGSTAMP.xml"/>-->
416
417 <para>
418 <command>export CC=gcc CXX=g++ ...</command>: Upstream now prefer
419 <application>clang</application> so that they can use one compiler
420 everywhere. On the X86 architectures <application>clang</application>
421 now appears to support most of the same security-hardening options as
422 <application>GCC</application>.
423 <!-- supported in llvm-11
424 but the newer
425 <literal>-fstack-clash-protection</literal> is still not supported.-->
426 With the current versions and the default flags,
427 <application>GCC</application> creates a marginally bigger build but
428 takes typically 2 SBU less time on a 4-core machine using the mozconfig
429 above.
430 </para>
431
432 <para>
433 <command>export MOZBUILD_STATE_PATH=${PWD}/mozbuild</command>: The build
434 is now supposed to tell you that it intends to create <filename
435 class="directory">~/.mozbuild</filename>, and offer you an option to
436 press &lt;ENTER&gt; to accept this, or Ctrl-C to cancel and restart the
437 build after specifying the directory. In practice, the message may not
438 appear until after &lt;ENTER&gt; is keyed, i.e. the build stalls.
439 </para>
440
441 <para>
442 That directory is used for a (probably random) telemetry identifier.
443 Creating this in the build directory, and deleting that after the
444 installation, prevents it being used. If you wish to participate in
445 telemetry, export MOZBUILD_STATE_PATH to point to its default directory.
446 </para>
447
448 <para>
449 <command>./mach build</command>: <application>Firefox</application>
450 now uses this <application>python</application> script to run the
451 build and install.
452 </para>
453
454 <para>
455 <option>./mach build --verbose</option>: Use this alternative if you
456 need details of which files are being compiled, together with any C or
457 C++ flags being used. But do not add '--verbose' to the install command,
458 it is not accepted there.
459 </para>
460
461 <para>
462 <option>./mach build -jN</option>: The build should, by default, use
463 all the online CPU cores. If using all the cores causes the build to swap
464 because you have insufficient memory, using fewer cores can be faster.
465 </para>
466
467<!--
468 <para>
469 <command>mkdir -pv /usr/lib/mozilla/plugins</command>: This ensures
470 that <filename class="directory">/usr/lib/mozilla/plugins/</filename>
471 exists.
472 </para>
473
474 <para>
475 <command>ln -sv ... /usr/lib/firefox/browser</command>:
476 This command creates a symbolic link to <filename
477 class="directory">/usr/lib/mozilla/plugins</filename>. It's not really
478 needed, as <application>Firefox</application> checks <filename
479 class="directory">/usr/lib/mozilla/plugins</filename> by default, but the
480 symbolic link is made to keep all the plugins installed in one folder.
481 </para>
482-->
483
484 </sect2>
485
486 <sect2 role="configuration">
487 <title>Configuring Firefox</title>
488
489 <para>
490 If you use a desktop environment like <application>Gnome</application> or
491 <application>KDE</application> you may like to create a
492 <filename>firefox.desktop</filename> file so that
493 <application>Firefox</application> appears in the panel's menus. <!--If you
494 didn't enable startup-notification in your mozconfig change the
495 StartupNotify line to false.--> As the
496 <systemitem class="username">root</systemitem> user:
497 </para>
498
499<screen role="root"><userinput>mkdir -pv /usr/share/applications &amp;&amp;
500mkdir -pv /usr/share/pixmaps &amp;&amp;
501
502MIMETYPE="text/xml;text/mml;text/html" &amp;&amp;
503MIMETYPE="$MIMETYPE;application/xhtml+xml;application/vnd.mozilla.xul+xml" &amp;&amp;
504MIMETYPE="$MIMETYPE;x-scheme-handler/http;x-scheme-handler/https" &amp;&amp;
505
506cat &gt; /usr/share/applications/firefox.desktop &lt;&lt; EOF &amp;&amp;
507<literal>[Desktop Entry]
508Encoding=UTF-8
509Name=Firefox Web Browser
510Comment=Browse the World Wide Web
511GenericName=Web Browser
512Exec=firefox %u
513Terminal=false
514Type=Application
515Icon=firefox
516Categories=GNOME;GTK;Network;WebBrowser;
517MimeType=$MIMETYPE
518StartupNotify=true</literal>
519EOF
520
521unset MIMETYPE &amp;&amp;
522
523ln -sfv /usr/lib/firefox/browser/chrome/icons/default/default128.png \
524 /usr/share/pixmaps/firefox.png</userinput></screen>
525
526 <sect3><title>Configuration Information</title>
527
528 <para>
529 The application settings for firefox are accessible by keying
530 <command>about:config</command> in the address bar.
531 </para>
532
533 <para>
534 Occasionally, getting working sound in
535 <application>firefox</application> can be a problem. Although upstream
536 prefers pulseaudio,
537 on balance using <application>Alsa</application> may be easier.
538 </para>
539
540 <para>
541 If you enabled <application>Alsa</application> for sound, you may need
542 to alter one variable to get working sound. If you run
543 <command>firefox</command> from a term and try to play something with
544 sound you might encounter error messages like:
545 </para>
546
547 <para>
548 <literal>Sandbox: seccomp sandbox violation: pid 3941, tid 4030,
549 syscall 16, args 48 2147767296 139909894784796 0 0 0.</literal>
550 </para>
551
552 <para>
553 That was on x86_64, on i686 the syscall number is 54. To allow this
554 syscall, in <command>about:config</command> change
555 <command>security.sandbox.content.syscall_whitelist</command> to 16
556 (or 54 if using i686).
557 </para>
558
559 <para>
560 If you use <command>pulseaudio</command> in a Desktop Environment, it
561 might already be started by that DE. But if it is not, although
562 firefox-57 managed to start it, firefox-58 did not. If you run
563 <command>firefox</command> from a term and this problem is present,
564 trying to play sound will
565 encounter error messages warning <literal>Can't get cubeb
566 context!</literal>
567 </para>
568
569 <para>
570 The fix for this is to close firefox, start pulseaudio to check it
571 does start (if not, read the information on Configuring in <xref
572 linkend="pulseaudio"/>) and restart firefox to check it is working.
573 If it now works, add the following to your <filename>~/.xinitrc</filename>:
574<phrase revision="sysv">
575<literal>pulseaudio --verbose --log-target=syslog&amp;</literal></phrase>
576<phrase revision="systemd">
577<literal>pulseaudio --verbose --log-target=journald&amp;</literal></phrase>
578 (unfortunately, on some systems this does not work).
579 </para>
580
581 <para>
582 You may wish to use multiple profiles within firefox. To do that, invoke
583 firefox as <command>firefox --ProfileManager</command>. You can also
584 check which profile is currently in use from
585 <command>about:profiles</command>.
586 </para>
587
588 <para>
589 Although WebRender (using the GPU for compositing) is not used by
590 default, it now appears to work well on supported hardware (ATI, Nvidia
591 and Intel GPUs with Mesa-18 or later. For an explanation, please see
592 <ulink
593 url="https://hacks.mozilla.org/2017/10/the-whole-web-at-maximum-fps-how-webrender-gets-rid-of-jank/">hacks.mozilla.org</ulink>.
594 The only downside seems to be that on a machine with limited RAM it might
595 use more RAM.
596 </para>
597
598 <para>
599 To check if WebRender is being used, look in about:support. In the Graphics
600 section Compositing will either show 'Basic' (i.e. not in use) or
601 'WebRender'. To enable it, go to about:config and change gfx.webrender.all
602 to True. You will need to restart firefox.
603 </para>
604
605 <para>
606 It may be useful to mention the processes from firefox which can appear in
607 <command>top</command> - as well as firefox itself, there may be multiple
608 Web Content processes, and now an RDD Process (Remote Data Decoder) which
609 appears when playing web videos encoded with av1 (libdav1d). If WebRender
610 has been enabled, a GPU Process will also appear when firefox has to
611 repaint (e.g. scrolling, opening a new tab, or playing a video).
612 </para>
613
614 </sect3>
615 </sect2>
616
617 <sect2 role="content">
618 <title>Contents</title>
619
620 <segmentedlist>
621 <segtitle>Installed Programs</segtitle>
622 <segtitle>Installed Libraries</segtitle>
623 <segtitle>Installed Directory</segtitle>
624
625 <seglistitem>
626 <seg>
627 firefox
628 </seg>
629 <seg>
630 Numerous libraries, browser components, plugins, extensions, and
631 helper modules installed in /usr/lib/firefox
632 </seg>
633 <seg>
634 /usr/lib/firefox and /usr/lib/mozilla
635 </seg>
636 </seglistitem>
637 </segmentedlist>
638
639 <variablelist>
640 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
641 <?dbfo list-presentation="list"?>
642 <?dbhtml list-presentation="table"?>
643
644 <varlistentry id="firefox-legacy-prog">
645 <term><command>firefox</command></term>
646 <listitem>
647 <para>
648 is a <application>GTK+-3</application> internet browser that uses
649 the Mozilla Gecko rendering engine
650 </para>
651 <indexterm zone="firefox-legacy firefox-legacy-prog">
652 <primary sortas="b-firefox">firefox</primary>
653 </indexterm>
654 </listitem>
655 </varlistentry>
656
657 </variablelist>
658
659 </sect2>
660
661</sect1>
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