Garbage collection
compartments are a fundamental cross-cutting concept in spidermonkey (see also compartments), though anything related to memory is now more concerned with zones, especially gc.
...zones mainly serve as boundaries for gcs: the garbage collector collects at the level of a zone, not an individual compartment.
... unlike compartments, zones have no special security properties.
...And 2 more matches

Actionscript Acceptance Tests - Archive of obsolete content
testname.as.avm_args files will take precedence over the dir.avm_args file testname.as.tz if a test is only valid for certain timezones, the timezones can be specified in this support file.
... below is a sample file that covers the 4 main us timezones: # place all timezones that this file applies to.
...# (see http://docs.python.org/library/time.html for details) # e.g.: eastern standard time/eastern daylight time = ('est','edt') # write timezones as tuples, one to each line.

JS_GetGCParameter
jsgc_mode_zone (1) the gc runs only the objects that belong to somezones are visited in a singleslice.
... jsgc_mode_zone_incremental (3) the gc runs only the objects that belong to somezones are visited in multipleslices.
...jsgc_allocation_threshold_factor_avoid_interrupt is used when a gc is already in progress for other zones and we may wish to avoid interrupting it.

Date and time formats used in HTML - HTML: Hypertext Markup Language
otherwise, the time zone string is constructed as follows: a character indicating the sign of the offset: the plus character ("+", or u+002b) for time zones to the east of the prime meridian or the minus character ("-", or u+002d) for time zones to the west of the prime meridian.
... while this format allows for time zones between -23:59 and +23:59, the current range of time zone offsets is -12:00 to +14:00, and no time zones are currently offset from the hour by anything other than 00, 30, or 45 minutes.
... this may change at more or less anytime, since countries are free to tamper with their time zones at any time and in any way they wish to do so.

Date.parse() - JavaScript
if ipodate is an existing date object, it can be set to august 9, 1995 (local time) as follows: ipodate.settime(date.parse('aug 9, 1995')); some other examples of parsing non-standard date strings: date.parse('aug 9, 1995'); returns 807937200000 in time zone gmt-0300, and other values in other time zones, since the string does not specify a time zone and is not iso format, therefore the time zone defaults to local.
... date.parse('wed, 09 aug 1995 00:00:00'); returns 807937200000 in time zone gmt-0300, and other values in other time zones, since there is no time zone specifier in the argument and it is not iso format, so is treated as local.
... date.parse('thu, 01 jan 1970 00:00:00'); returns 14400000 in time zone gmt-0400, and other values in other time zones, since no time zone is provided and the string is not in iso format, therefore the local time zone is used.

about:memory
├───40,214,384 b (04.17%) -- add-ons │ ├──21,184,320 b (02.20%) ++ {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}/js-non-window/zones/zone(0x100496800)/compartment([system principal], jar:file:///users/njn/library/application%20support/firefox/profiles/puna0zr8.new/extensions/%7bd10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d%7d.xpi!/bootstrap.js (from: resource://gre/modules/addons/xpiprovider.jsm:4307)) │ ├──11,583,312 b (01.20%) ++ jid1-xufzosoflzsoxg@jetpack/js-non-window/zones/zone(0x100496800) │ ├───5,574,608 b...
... (00.58%) -- {59c81df5-4b7a-477b-912d-4e0fdf64e5f2} │ │ ├──5,529,280 b (00.57%) -- window-objects │ │ │ ├──4,175,584 b (00.43%) ++ top(chrome://chatzilla/content/chatzilla.xul, id=4293) │ │ │ └──1,353,696 b (00.14%) ++ top(chrome://chatzilla/content/output-window.html, id=4298) │ │ └─────45,328 b (00.00%) ++ js-non-window/zones/zone(0x100496800)/compartment([system principal], file:///users/njn/library/application%20support/firefox/profiles/puna0zr8.new/extensions/%7b59c81df5-4b7a-477b-912d-4e0fdf64e5f2%7d/components/chatzilla-service.js) │ └───1,872,144 b (00.19%) ++ treestyletab@piro.sakura.ne.jp/js-non-window/zones/zone(0x100496800) more things worth pointing out are as follows.

Zombie compartments
compartments firefox’s javascript memory is segregated into zones and compartments.
... ├──1.07 mb (00.21%) -- type-objects │ │ │ ├──1.04 mb (00.21%) ── gc-heap │ │ │ └──0.03 mb (00.01%) ── malloc-heap │ │ ├──0.23 mb (00.05%) ++ strings │ │ └──0.18 mb (00.04%) ── gc-heap-arena-admin the first line says that the window from www.google.de is taking up 28.45 mb and futher breaks it down into zones, compartments, dom etc.

border-image-slice - CSS: Cascading Style Sheets
zones 1-4 are corner regions.
... zones 5-8 are edge regions.

mask-border-slice - CSS: Cascading Style Sheets
zones 1-4 are corner regions.
... zones 5-8 are edge regions.

<input type="datetime-local"> - HTML: Hypertext Markup Language
setting timezones one thing the datetime-local input type doesn't provide is a way to set the time zone and/or locale of the date/time control.
... note: the above code snippet is taken from all world timezones in an html select element.

Enhanced Extension Installation - Archive of obsolete content
[hklm|hkcu]\software\mozilla\firefox\extensions given these goals, and the likelihood of future goals, such as potential for extensions to the xulrunner framework, common drop zones for xpis etc it makes sense to have the set of install locations be customizable.

Hacking Tips
after the roots come a series of zones.

Shell global objects
if zone is given, gc any zones that were scheduled for gc via schedulegc.

IntersectionObserverEntry.intersectionRect - Web APIs
function intersectioncallback(entries) { entries.foreach(function(entry) { refreshzones.push({ element: entry.target, rect: entry.intersectionrect }); }); } specifications specification status comment intersection observerthe definition of 'intersectionobserverentry.intersectionrect' in that specification.

::-webkit-meter-even-less-good-value - CSS: Cascading Style Sheets
the ::-webkit-meter-even-less-good-value gives a red color to a <meter> element when the value and the optimum attributes fall outside the low-high range, but in opposite zones.