Support MDN WebExtensions examples

[cezaraugusto]

Ref: https://github.com/mdn/webextensions-examples

Index	Done	MV	Source	Name
0	⏳	2	src	mdn-all/annotate-page
1	⏳	2	src	mdn-all/apply-css
2	⏳	2	src	mdn-all/beastify
3	⏳	2	src	mdn-all/bookmark-it
4	⏳	2	src	mdn-all/borderify
5	⏳	2	src	mdn-all/chill-out
6	⏳	2	src	mdn-all/commands
7	⏳	2	src	mdn-all/content-script-register
8	⏳	2	src	mdn-all/context-menu-copy-link-with-types
9	⏳	2	src	mdn-all/contextual-identities
10	⏳	2	src	mdn-all/cookie-bg-picker
11	⏳	2	src	mdn-all/devtools-inspector-sidebar
12	⏳	2	src	mdn-all/devtools-panels
13	⏳	2	src	mdn-all/discogs-search
14	⏳	3	src	mdn-all/dnr-block-only
15	⏳	3	src	mdn-all/dnr-dynamic-with-options
16	⏳	3	src	mdn-all/dnr-redirect-url
17	⏳	2	src	mdn-all/dynamic-theme
18	⏳	2	src	mdn-all/emoji-substitution
19	✅	2	src	mdn-all/eslint-example
20	⏳	2	src	mdn-all/export-helpers
21	⏳	2	src	mdn-all/favourite-colour
22	⏳	2	src	mdn-all/find-across-tabs
23	⏳	2	src	mdn-all/firefox-code-search
24	⏳	2	src	mdn-all/forget-it
25	⏳	2	src	mdn-all/google-userinfo
26	⏳	2	src	mdn-all/history-deleter
27	⏳	2	src	mdn-all/http-response
28	⏳	2	src	mdn-all/imagify
29	⏳	2	src	mdn-all/latest-download
30	⏳	2	src	mdn-all/list-cookies
31	⏳	2	src	mdn-all/menu-accesskey-visible
32	⏳	2	src	mdn-all/menu-demo
33	⏳	2	src	mdn-all/menu-labelled-open
34	⏳	2	src	mdn-all/menu-remove-element
35	⏳	2	src	mdn-all/menu-search
36	✅	2	src	mdn-all/mocha-client-tests/addon
37	⏳	2	src	mdn-all/native-messaging/add-on
38	⏳	2	src	mdn-all/navigation-stats
39	⏳	2	src	mdn-all/notify-link-clicks-i18n
40	⏳	2	src	mdn-all/open-irc-links
41	⏳	2	src	mdn-all/open-my-page-button
42	⏳	2	src	mdn-all/page-to-extension-messaging
43	⏳	2	src	mdn-all/permissions
44	⏳	2	src	mdn-all/private-browsing-theme
45	⏳	2	src	mdn-all/proxy-blocker
46	⏳	2	src	mdn-all/quicknote
47	⏳	2	src	mdn-all/root-cert-stats
48	⏳	2	src	mdn-all/runtime-examples
49	⏳	2	src	mdn-all/selection-to-clipboard
50	⏳	2	src	mdn-all/session-state
51	⏳	2	src	mdn-all/store-collected-images/webextension-plain
52	⏳	2	src	mdn-all/store-collected-images/webextension-with-webpack/extension
53	⏳	2	src	mdn-all/stored-credentials
54	⏳	2	src	mdn-all/tabs-tabs-tabs
55	⏳	2	src	mdn-all/theme-integrated-sidebar
56	⏳	2	src	mdn-all/theme-switcher
57	⏳	2	src	mdn-all/themes/animated
58	⏳	2	src	mdn-all/themes/temp
59	⏳	2	src	mdn-all/themes/weta_fade
60	⏳	2	src	mdn-all/themes/weta_fade_chrome
61	⏳	2	src	mdn-all/themes/weta_mirror
62	⏳	2	src	mdn-all/themes/weta_tiled
63	⏳	2	src	mdn-all/top-sites
64	⏳	2	src	mdn-all/user-agent-rewriter
65	⏳	2	src	mdn-all/user-script-register
66	⏳	2	src	mdn-all/webpack-modules/addon
67	⏳	2	src	mdn-all/window-manipulator