Генерация GUID'ов

GUIDs are used in Mozilla programming for identifying several types of entities, including XPCOM Interfaces (this type of GUIDs is callled IID), components (CID), and legacy add-ons—like extensions and themes—that were created prior to Firefox 1.5. Add-ons can (and should) be identified with IDs of the form extensionname@organization.tld since Firefox 1.5.

Предупреждение: If you just want an ID for your add-on, generating a GUID is almost definitely not what you want to do. Using the extensionname@organization.tld form is approximately one thousand times easier for everyone involved. Don't have a domain name? Do you have a blog on a subdomain? Use that. If all else fails, using extensionname@yourusername.addons.mozilla.org should be fine; no one will care. Remember, these are identifiers, not e-mail addresses, and they're never resolved.

Canonical form

The common form of a GUID is xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx, where each x stands for a hexadecimal digit. There are a number of tools that can be used to generate a GUID in the canonical form.

Note: If you do choose to use an email-style ID for your add-on, you probably don't want it to be a real email address, since it might attract spam.

Online tools


Пользвоатели Windows могут использовать утилиту GuidGen от Microsoft для получения GUID. (Эта утилита является частью MS Visual C++)


Используйте /usr/bin/uuidgen. Является частью пакета libuuid1 (Debian).

Mac OS X

Используйте /usr/bin/uuidgen.


  • jkeiser's Mozilla tools include a UUID generator with output format of both C++ and IDL style.
  • sfink's update-uuids will change the uuid for a given interface and all of its descendants, updating all *.idl files within a directory tree.


A UUID can be generated from privileged Mozilla code using nsIUUIDGenerator. See the linked page for details.


Используя #define для IID и CID в коде Mozilla C++, вы должны использовать следующий формат:

// xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx
#define NS_...ID \
  { 0xXX, 0xXX, 0xXX, 0xXX, 0xXX, 0xXX, 0xXX, 0xXX } }

You can generate code in this format using one of the following tools.

Онлайн утилита


guidgen.exe, часть Microsoft Visual Studio, может генерировать UUID в нужном формате.


Можете добавить в файл .bashrc следующий код:

    local UUID=$(uuidgen)
    echo "// $UUID"
    echo "#define NS__IID \\"
    echo "{ 0x${UUID:0:8}, 0x${UUID:9:4}, 0x${UUID:14:4}, \\"
    echo -n "  { 0x${UUID:19:2}, 0x${UUID:21:2}, 0x${UUID:24:2}, "
    echo -n "0x${UUID:26:2}, 0x${UUID:28:2}, 0x${UUID:30:2}, "
    echo "0x${UUID:32:2}, 0x${UUID:34:2} } }"


$uuid = `uuidgen`;
chomp $uuid;
print $uuid, "\n";
@parts = ($uuid =~ /^(.{8})-(.{4})-(.{4})-(..)(..)-(..)(..)(..)(..)(..)(..)$/);
print "{ 0x$parts[0], 0x$parts[1], 0x$parts[2], \\", "\n", " { ";
for (3 .. 9) {
  print "0x$parts[$_], ";
print "0x$parts[10] } }", "\n";