Index - Web APIs
421 cssnumericvalue.add() api, css typed object model api, cssnumericvalue, experimental, houdini, method, reference, add() the add() method of the cssnumericvalue interface adds a supplied number to the cssnumericvalue.
... 1421 formdata.has() api, formdata, method, reference, xhr, xmlhttprequest, has the has() method of the formdata interface returns a boolean stating whether a formdata object contains a certain key.
... 2421 mediasource.endofstream() api, audio, experimental, mse, media source extensions, mediasource, method, reference, video, endofstream the endofstream() method of the mediasource interface signals the end of the stream.
...And 12 more matches

:is() (:matches(), :any()) - CSS: Cascading Style Sheets
esktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internet:is()chrome full support 68notes disabled full support 68notes disabled notes combinators in the selector list argument may not match correctly (see bug 842157).disabled from version 68: this feature is behind the #enable-experimental-web-platform-features preference (needs to be set to enabled).
... no support 66 — 71notes alternate name disabled notes combinators in the selector list argument may not match correctly (see bug 842157).alternate name uses the non-standard name: :matches()disabled from version 66 until version 71 (exclusive): this feature is behind the #enable-experimental-web-platform-features preference (needs to be set to enabled).
... full support 12notes alternate name notes doesn't support combinators.alternate name uses the non-standard name: :-webkit-any()edge full support 79notes disabled full support 79notes disabled notes combinators in the selector list argument may not match correctly (see bug 842157).disabled from version 79: this feature is behind the #enable-experimental-web-platform-features preference (needs to be set to enabled).
...And 5 more matches

Index - Archive of obsolete content
421 developing new mozilla features developing mozilla, outdated_articles tips for contributing new features to mozilla.
... 494 crmf request object rfc 4211, the internet x.509 public key infrastructure certificate request message format (crmf), defines a certreqmessage.
... 1421 disableautoselect xul properties, xul reference no summary!
... 3421 images, tables, and mysterious gaps css, guide, reference almost no matter when you started creating web pages, odds are pretty high you have one or more designs based on the classic "convoluted tables and lots of images" paradigm.

NSS 3.54 release notes
certificate authority changes the following ca certificates were added: bug 1645186 - certsign root ca g2 sha-256 fingerprint: 657cfe2fa73faa38462571f332a2363a46fce7020951710702cdfbb6eeda3305 bug 1645174 - e-szigno root ca 2017 sha-256 fingerprint: beb00b30839b9bc32c32e4447905950641f26421b15ed089198b518ae2ea1b99 bug 1641716 - microsoft ecc root certificate authority 2017 sha-256 fingerprint: 358df39d764af9e1b766e9c972df352ee15cfac227af6ad1d70e8e4a6edcba02 bug 1641716 - microsoft rsa root certificate authority 2017 sha-256 fingerprint: c741f70f4b2a8d88bf2e71c14122ef53ef10eba0cfa5e64cfa20f418853073e0 the following ca certifi...
... bug 1642146 - fix undefined reference to `port_zalloc_stub' in seed.c.
... bug 1642153 - fix infinite recursion building nss.

Intl.NumberFormat() constructor - JavaScript
possible values are the iso 4217 currency codes, such as "usd" for the us dollar, "eur" for the euro, or "cny" for the chinese rmb — see the current currency & funds code list.
...possible values are from 0 to 20; the default for plain number and percent formatting is 0; the default for currency formatting is the number of minor unit digits provided by the iso 4217 currency code list (2 if the list doesn't provide that information).
...possible values are from 0 to 20; the default for plain number formatting is the larger of minimumfractiondigits and 3; the default for currency formatting is the larger of minimumfractiondigits and the number of minor unit digits provided by the iso 4217 currency code list (2 if the list doesn't provide that information); the default for percent formatting is the larger of minimumfractiondigits and 0.

NSS_3.12_release_notes.html
bug 414985: crash in pkix_pl_ocsprequest_destroy bug 421870: strsclnt crashed in pkix tests.
...bug 406647: libpkix does not use user defined revocation checkers bug 407064: pkix_pl_ldapcertstore_buildcrllist should not fail if a crl fails to be decoded bug 421216: libpkix test nss_thread leaks a test certificate bug 301259: signtool usage message is unhelpful bug 389781: nss should be built size-optimized in browser builds on linux, windows, and mac bug 90426: use of obsolete typedefs in public nss headers bug 113323: the first argument to pk11_findcertfromnickname should be const.

PaymentCurrencyAmount.currencySystem - Web APIs
for example, the default is urn:iso:std:iso:4217, which specifies that the standard used is iso 4217.
...the default, urn:iso:std:iso:4217, indicates the iso 4217 standard.

PaymentCurrencyAmount - Web APIs
currency a string containing a valid 3-letter iso 4217 currency identifier (iso 4217) indicating the currency used for the payment value.
...this has been removed; instead of allowing sites to choose the standard to use, iso 4217 is always used for the currency identifier now.

Intl.PluralRules() constructor - JavaScript
possible values are from 0 to 20; the default for plain number and percent formatting is 0; the default for currency formatting is the number of minor unit digits provided by the iso 4217 currency code list (2 if the list doesn't provide that information).
...possible values are from 0 to 20; the default for plain number formatting is the larger of minimumfractiondigits and 3; the default for currency formatting is the larger of minimumfractiondigits and the number of minor unit digits provided by the iso 4217 currency code list (2 if the list doesn't provide that information); the default for percent formatting is the larger of minimumfractiondigits and 0.

CRMF Request object - Archive of obsolete content
rfc 4211, the internet x.509 public key infrastructure certificate request message format (crmf), defines a certreqmessage.

Index - Archive of obsolete content
421 building accessible custom components in xul accessibility, dhtml, xul dhtml accessibility is a new technology which enables developers to construct accessible controls within (x)html pages.

Mozilla's DOCTYPE sniffing - Archive of obsolete content
the public identifier "-//w3c//dtd html experimental 970421//en".

Index - MDN Web Docs Glossary: Definitions of Web-related terms
421 simple response header cors, glossary, http old term for cors-safelisted response header.

Localization technical reviews
for more info about access keys in the technical review process, see bug 421893.

Profiling with the Firefox Profiler
custom annotations in bug 1334218 an annotation was added to presshell::paint to show the url of the document being painted.