Firefox default forms.css

forms.css

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/** 
  Styles for old GFX form widgets
 **/ 
 

@namespace url(http://www.w3.org/1999/xhtml); /* set default namespace to HTML */
@namespace xul url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

*|*::-moz-fieldset-content {
  display: block;
  unicode-bidi: inherit;
  text-overflow: inherit;
  height: 100%;   /* Need this so percentage heights of kids work right */
}

/* miscellaneous form elements */

fieldset > legend {
  padding-left: 2px;
  padding-right: 2px;
  width: -moz-fit-content;
}

legend {
  display: block;
}

fieldset {
  display: block;
  margin-left: 2px;
  margin-right: 2px;
  padding: 0.35em 0.625em 0.75em;
  border: 2px groove ThreeDFace;
}

label {
  cursor: default;
}

/* default inputs, text inputs, and selects */

/* Note: Values in nsNativeTheme IsWidgetStyled function 
   need to match textfield background/border values here */

input {
  -moz-appearance: textfield;
  /* The sum of border-top, border-bottom, padding-top, padding-bottom
     must be the same here, for buttons, and for <select> (including its
     internal padding magic) */
  padding: 1px 0 1px 0;
  border: 2px inset ThreeDFace;
  background-color: -moz-Field;
  color: -moz-FieldText;
  font: -moz-field;
  text-rendering: optimizeLegibility;
  line-height: normal !important;
  text-align: start;
  text-transform: none;
  word-spacing: normal;
  letter-spacing: normal;
  cursor: text;
  -moz-binding: url("chrome://global/content/platformHTMLBindings.xml#inputFields");
  text-indent: 0;
  -moz-user-select: text;
  text-shadow: none;
}

input > .anonymous-div,
input::-moz-placeholder {
  word-wrap: normal !important;
  /* Make the line-height equal to the available height */
  line-height: -moz-block-height;
}

@-moz-document url-prefix(chrome://) {
  input.uri-element-right-align:-moz-locale-dir(rtl) {
    direction: ltr !important;
    text-align: right !important;
  }

  /* Make sure that the location bar's alignment in RTL mode changes according
     to the input box direction if the user switches the text direction using
     cmd_switchTextDirection (which applies a dir attribute to the input box's
     anonymous div). */
  input.uri-element-right-align:-moz-locale-dir(rtl) > .anonymous-div[dir=ltr] {
    text-align: left !important;
  }
}

textarea {
  margin: 1px 0 1px 0;
  border: 2px inset ThreeDFace;
  background-color: -moz-Field;
  color: -moz-FieldText;
  font: medium -moz-fixed;
  text-rendering: optimizeLegibility;
  text-align: start;
  text-transform: none;
  word-spacing: normal;
  letter-spacing: normal;
  vertical-align: text-bottom;
  cursor: text;
  resize: both;
  -moz-binding: url("chrome://global/content/platformHTMLBindings.xml#textAreas");
  -moz-appearance: textfield-multiline;
  text-indent: 0;
  -moz-user-select: text;
  text-shadow: none;
  word-wrap: break-word;
}

textarea > scrollbar {
  cursor: default;
}

textarea > .anonymous-div,
input > .anonymous-div,
input::-moz-placeholder,
textarea::-moz-placeholder {
  white-space: pre;
  overflow: auto;
  border: 0px !important;
  /*
   * The 1px horizontal padding is for parity with Win/IE.
   * We need to mark it !important to make sure it can't be changed on the
   * placeholder.
   */
  padding: 0px 1px !important;
  margin: 0px;
  text-decoration: inherit;
  -moz-text-decoration-color: inherit;
  -moz-text-decoration-style: inherit;
  display: inline-block;
  ime-mode: inherit;
  resize: inherit;
}

textarea > .anonymous-div.wrap,
input > .anonymous-div.wrap {
  white-space: pre-wrap;
}
textarea > .anonymous-div.inherit-overflow,
input > .anonymous-div.inherit-overflow {
  overflow: inherit;
}

input::-moz-placeholder,
textarea::-moz-placeholder {
  /*
   * Changing display to inline can leads to broken behaviour and will assert.
   */
  display: inline-block !important;

  /*
   * Changing resize would display a broken behaviour and will assert.
   */
  resize: none !important;

  overflow: hidden !important;

  /*
   * The placeholder should be ignored by pointer otherwise, we might have some
   * unexpected behavior like the resize handle not being selectable.
   */
  pointer-events: none !important;

  opacity: 0.54;
}

textarea::-moz-placeholder {
  white-space: pre-wrap !important;
}

input:-moz-read-write,
textarea:-moz-read-write {
  -moz-user-modify: read-write !important;
}

select {
  margin: 0;
  border-color: ThreeDFace;
  background-color: -moz-Combobox;
  color: -moz-ComboboxText;
  font: -moz-list;
  /*
   * Note that the "UA !important" tests in
   * layout/style/test/test_animations.html depend on this rule, because
   * they need some UA !important rule to test.  If this changes, use a
   * different one there.
   */
  line-height: normal !important;
  white-space: nowrap !important;
  word-wrap: normal !important;
  text-align: start; 
  cursor: default;
  -moz-box-sizing: border-box;
  -moz-user-select: none;
  -moz-appearance: menulist;
  border-width: 2px;
  border-style: inset;
  text-indent: 0;
  overflow: -moz-hidden-unscrollable;
  text-shadow: none;
  /* No text-decoration reaching inside, by default */
  display: inline-block;
}

/* Need the "select[size][multiple]" selector to override the settings on
   'select[size="1"]', eg if one has <select size="1" multiple> */
   
select[size],
select[multiple],
select[size][multiple] {
  /* Different alignment and padding for listbox vs combobox */
  background-color: -moz-Field;
  color: -moz-FieldText;
  vertical-align: text-bottom;
  padding: 1px 0 1px 0;
  -moz-appearance: listbox;
}

select[size="0"],
select[size="1"] {
  /* Except this is not a listbox */
  background-color: -moz-Combobox;
  color: -moz-ComboboxText;
  vertical-align: baseline;
  padding: 0;
  -moz-appearance: menulist;
}

select > button {
  width: 12px;
  height: 12px;
  white-space: nowrap;
  position: static !important;
  background-image: url("arrow.gif") !important;
  background-repeat: no-repeat !important;
  background-position: center !important;
  -moz-appearance: menulist-button;

  /* Make sure to size correctly if the combobox has a non-auto height. */
  height: 100% ! important;
  -moz-box-sizing: border-box ! important;

  /*
    Make sure to align properly with the display frame.  Note that we
    want the baseline of the combobox to match the baseline of the
    display frame, so the dropmarker is what gets the vertical-align.
  */
  vertical-align: top !important;
}

select > button:active {
  background-image: url("arrowd.gif") !important;
}

select:empty {
  width: 2.5em;
}

*|*::-moz-display-comboboxcontrol-frame {
  overflow: -moz-hidden-unscrollable;
  /* This top/bottom padding plus the combobox top/bottom border need to
     add up to the top/bottom borderpadding of text inputs and buttons */ 
  padding-top: 1px;
  padding-bottom: 1px;
  -moz-padding-start: 4px;
  -moz-padding-end: 0;
  color: inherit;
  white-space: nowrap;
  text-align: inherit;
  -moz-user-select: none;
  /* Make sure to size correctly if the combobox has a non-auto height. */
  height: 100% ! important;
  -moz-box-sizing: border-box ! important;
}

option {
  display: block;
  float: none !important;
  position: static !important;
  min-height: 1em;
  line-height: normal !important;
  -moz-user-select: none;
  text-indent: 0;
  white-space: nowrap !important;
  word-wrap: normal !important;
}

select > option {
  padding-top : 0;
  padding-bottom: 0;
  -moz-padding-start: 3px;
  -moz-padding-end: 5px;
}

option:checked {
  background-color: -moz-html-cellhighlight !important;
  color: -moz-html-cellhighlighttext !important;
}

select:focus > option:checked,
select:focus > optgroup > option:checked {
  background-color: Highlight ! important;
  color: HighlightText ! important;
}

optgroup {
  display: block;
  float: none !important;
  position: static !important;
  font: -moz-list;
  line-height: normal !important;
  font-style: italic;
  font-weight: bold;
  font-size: inherit;
  -moz-user-select: none;
  text-indent: 0;
  white-space: nowrap !important;
  word-wrap: normal !important;
}

optgroup > option {
  -moz-padding-start: 20px;
  font-style: normal;
  font-weight: normal;
}

optgroup:before {
  display: block;
  content: attr(label);
}

*|*::-moz-dropdown-list {
  z-index: 2147483647;
  background-color: inherit;
  -moz-user-select: none;
  position: static !important;
  float: none !important;

  /*
   * We can't change the padding here, because that would affect our
   * intrinsic width, since we scroll.  But at the same time, we want
   * to make sure that our left border+padding matches the left
   * border+padding of a combobox so that our scrollbar will line up
   * with the dropmarker.  So set our left border to 2px.
   */
  border: 1px outset black !important;
  border-left-width: 2px ! important;
} 

input:disabled,
textarea:disabled,
option:disabled,
optgroup:disabled,
select:disabled:disabled /* Need the pseudo-class twice to have the specificity
                            be at least the same as select[size][multiple] above */
{
  -moz-user-input: disabled;
  color: GrayText;
  background-color: ThreeDFace;
  cursor: inherit;
}

input:disabled > .anonymous-div,
textarea:disabled > .anonymous-div {
  cursor: default;
}

option:disabled,
optgroup:disabled {
  background-color: transparent;
}

/* hidden inputs */
input[type="hidden"] {
  -moz-appearance: none;
  display: none !important;
  padding: 0;
  border: 0;
  cursor: auto;
  -moz-user-focus: ignore;
  -moz-binding: none;
}

/* image buttons */
input[type="image"] {
  -moz-appearance: none;
  padding: 0;
  border: none;
  background-color: transparent;
  font-family: sans-serif;
  font-size: small;
  cursor: pointer;
  -moz-binding: none;
}

input[type="image"]:disabled {
  cursor: inherit;
}

input[type="image"]:-moz-focusring {
  /* Don't specify the outline-color, we should always use initial value. */
  outline: 1px dotted;
}

/* file selector */
input[type="file"] {
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
  color: inherit;

  /* Revert rules which apply on all inputs. */
  -moz-appearance: none;
  -moz-binding: none;
  cursor: default;

  border: none;
  background-color: transparent;
  padding: 0;
}

input[type="file"] > xul|label {
  min-width: 12em;
  -moz-padding-start: 5px;

  color: inherit;
  font-size: inherit;
  letter-spacing: inherit;

  /*
   * Force the text to have LTR directionality. Otherwise filenames containing
   * RTL characters will be reordered with chaotic results.
   */
  direction: ltr !important;
}

/* button part of file selector */
input[type="file"] > button[type="button"] {
  height: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  cursor: inherit;
}

/* Try to make RTL <input type='file'> look nicer. */
/* TODO: use text-align: match-parent when bug 645642 is fixed. */
input[type="file"]:-moz-dir(rtl) > xul|label {
  -moz-padding-start: 0px;
  padding-right: 5px;
  text-align: right;
}

/* radio buttons */
input[type="radio"] {
  -moz-appearance: radio;
  margin: 3px 3px 0px 5px;
  border-radius: 100% !important;
}

/* check boxes */
input[type="checkbox"] {
  -moz-appearance: checkbox;
  margin: 3px 3px 3px 4px;
  border-radius: 0 !important;
}

/* common features of radio buttons and check boxes */

/* NOTE: The width, height, border-width, and padding here must all
   add up the way nsFormControlFrame::GetIntrinsic(Width|Height)
   expects them to, or they will not come out with total width equal
   to total height on sites that set their 'width' or 'height' to 'auto'.
   (Should we maybe set !important on width and height, then?)  */
input[type="radio"],
input[type="checkbox"] {
  -moz-box-sizing: border-box;
  width: 13px;
  height: 13px;
  cursor: default;
  padding: 0 !important;
  -moz-binding: none;
  /* same colors as |input| rule, but |!important| this time. */
  background-color: -moz-Field ! important;
  color: -moz-FieldText ! important;
  border: 2px inset ThreeDFace ! important;
}

input[type="radio"]:disabled,
input[type="radio"]:disabled:active,
input[type="radio"]:disabled:hover,
input[type="radio"]:disabled:hover:active,
input[type="checkbox"]:disabled,
input[type="checkbox"]:disabled:active,
input[type="checkbox"]:disabled:hover,
input[type="checkbox"]:disabled:hover:active {
  padding: 1px;
  border: 1px inset ThreeDShadow ! important;
  /* same as above, but !important */
  color: GrayText ! important;
  background-color: ThreeDFace ! important;
  cursor: inherit; 
}

input[type="checkbox"]:-moz-focusring,
input[type="radio"]:-moz-focusring {
  border-style: groove !important;
}

input[type="checkbox"]:hover:active,
input[type="radio"]:hover:active {
  background-color: ThreeDFace ! important;
  border-style: inset !important;
}

/* buttons */

/* Note: Values in nsNativeTheme IsWidgetStyled function 
   need to match button background/border values here */

button, 
input[type="reset"],
input[type="button"],
input[type="submit"] { 
  -moz-appearance: button;
  /* The sum of border-top, border-bottom, padding-top, padding-bottom
     must be the same here, for text inputs, and for <select>.  For
     buttons, make sure to include the -moz-focus-inner border/padding. */
  padding: 0px 6px 0px 6px;
  border: 2px outset ButtonFace;
  background-color: ButtonFace;
  color: ButtonText; 
  font: -moz-button;
  line-height: normal;
  white-space: pre;
  cursor: default;
  -moz-box-sizing: border-box;
  -moz-user-select: none;
  -moz-binding: none;
  text-align: center;
  text-shadow: none;
}

button {
  /* Buttons should lay out like "normal" html, mostly */
  white-space: inherit;
  text-indent: 0;
  /* But no text-decoration reaching inside, by default */
  display: inline-block;
}

*|*::-moz-button-content {
  display: block;
}

button:hover,
input[type="reset"]:hover,
input[type="button"]:hover,
input[type="submit"]:hover {
  background-color: -moz-buttonhoverface;
  color: -moz-buttonhovertext;
}

button:active:hover,
input[type="reset"]:active:hover,
input[type="button"]:active:hover,
input[type="submit"]:active:hover {
  padding: 0px 5px 0px 7px;
  border-style: inset;
  background-color: ButtonFace;
  color: ButtonText;
}

button::-moz-focus-inner,
input[type="reset"]::-moz-focus-inner,
input[type="button"]::-moz-focus-inner,
input[type="submit"]::-moz-focus-inner,
input[type="file"] > button[type="button"]::-moz-focus-inner {
  padding: 0px 2px 0px 2px;
  border: 1px dotted transparent;
}

button:-moz-focusring::-moz-focus-inner,
input[type="reset"]:-moz-focusring::-moz-focus-inner,
input[type="button"]:-moz-focusring::-moz-focus-inner,
input[type="submit"]:-moz-focusring::-moz-focus-inner,
input[type="file"] > button[type="button"]:-moz-focusring::-moz-focus-inner {
  border-color: ButtonText;
}

button:disabled:active, button:disabled,
input[type="reset"]:disabled:active,
input[type="reset"]:disabled,
input[type="button"]:disabled:active,
input[type="button"]:disabled,
select:disabled > button,
select:disabled > button,
input[type="submit"]:disabled:active,
input[type="submit"]:disabled {
  /* The sum of border-top, border-bottom, padding-top, padding-bottom
     must be the same here and for text inputs */
  padding: 0px 6px 0px 6px;
  border: 2px outset ButtonFace;
  color: GrayText;
  cursor: inherit; 
}

 /*
  * Make form controls inherit 'unicode-bidi' transparently as required by
  *  their various anonymous descendants and pseudo-elements:
  *
  * <textarea> and <input type="text">:
  *  inherit into the XULScroll frame with class 'anonymous-div' which is a
  *  child of the text control.
  *
  * Buttons (either <button>, <input type="submit">, <input type="button">
  *          or <input type="reset">)
  *  inherit into the ':-moz-button-content' pseudo-element.
  *
  * <select>:
  *  inherit into the ':-moz-display-comboboxcontrol-frame' pseudo-element and
  *  the <optgroup>'s ':before' pseudo-element, which is where the label of
  *  the <optgroup> gets displayed. The <option>s don't use anonymous boxes,
  *  so they need no special rules.
  */
textarea > .anonymous-div,
input > .anonymous-div,
input::-moz-placeholder,
textarea::-moz-placeholder,
*|*::-moz-button-content,
*|*::-moz-display-comboboxcontrol-frame,
optgroup:before {
  unicode-bidi: inherit;
  text-overflow: inherit;
}

/**
 * Set default style for invalid elements.
 */
:not(output):-moz-ui-invalid {
  box-shadow: 0 0 1.5px 1px red;
}

:not(output):-moz-ui-invalid:-moz-focusring {
  box-shadow: 0 0 2px 2px rgba(255,0,0,0.4);
}

output:-moz-ui-invalid {
  color: red;
}

@media print {
  input, textarea, select, button {
    -moz-user-input: none !important;
  }

  input[type="file"] { height: 2em; }
}

progress {
  -moz-appearance: progressbar;
  display: inline-block;
  vertical-align: -0.2em;

  /* Default style in case of there is -moz-appearance: none; */
  border: 2px solid;
  /* #e6e6e6 is a light gray. */
  -moz-border-top-colors: ThreeDShadow #e6e6e6;
  -moz-border-right-colors: ThreeDHighlight #e6e6e6;
  -moz-border-bottom-colors: ThreeDHighlight #e6e6e6;
  -moz-border-left-colors: ThreeDShadow #e6e6e6;
  background-color: #e6e6e6;
}

::-moz-progress-bar {
  /* Prevent styling that would change the type of frame we construct. */
  display: inline-block ! important;
  float: none ! important;
  position: static ! important;
  overflow: visible ! important;
  -moz-box-sizing: border-box ! important;

  -moz-appearance: progresschunk;
  height: 100%;
  width: 100%;

  /* Default style in case of there is -moz-appearance: none; */
  background-color: #0064b4; /* blue */
}

meter {
  -moz-appearance: meterbar;
  display: inline-block;
  vertical-align: -0.2em;

  background: -moz-linear-gradient(top, #e6e6e6, #e6e6e6, #eeeeee 20%, #cccccc 45%, #cccccc 55%);
}

::-moz-meter-bar {
  /* Block styles that would change the type of frame we construct. */
  display: inline-block ! important;
  float: none ! important;
  position: static ! important;
  overflow: visible ! important;

  -moz-appearance: meterchunk;
  height: 100%;
  width: 100%;
}

:-moz-meter-optimum::-moz-meter-bar {
  /* green. */
  background: -moz-linear-gradient(top, #ad7, #ad7, #cea 20%, #7a3 45%, #7a3 55%);
}
:-moz-meter-sub-optimum::-moz-meter-bar {
  /* orange. */
  background: -moz-linear-gradient(top, #fe7, #fe7, #ffc 20%, #db3 45%, #db3 55%);
}
:-moz-meter-sub-sub-optimum::-moz-meter-bar {
  /* red. */
  background: -moz-linear-gradient(top, #f77, #f77, #fcc 20%, #d44 45%, #d44 55%);
}

Hi tagliala,
I am trying to use a style of select option { white-space : normal !important} in Firefox, but due to forms.css this important style never gets applied but instead white-space : no wrap from select CSS in forms.css gets applied. Do you know how to correct this and have the custom important style applied? A sample page for this is at http://www.kandoodev.com/FireFoxWhiteSpaceIssue.html

Hi tagliala,
I am trying to use a style of select option { white-space : normal !important} in Firefox, but due to forms.css this important style never gets applied but instead white-space : no wrap from select CSS in forms.css gets applied. Do you know how to correct this and have the custom important style applied? A sample page for this is at http://www.kandoodev.com/FireFoxWhiteSpaceIssue.html

This is how I solved it:
https://stackoverflow.com/a/60060129/1735394

Hi @townivan, thanks for the heads-up, but I do not even recall what this gist was for, 😅

I looks to me like this gist is a copy of forms.css that Firefox uses as its default browser styles for forms. These may be selectors that one would want to override if they find their stuff looking differently on Firefox vs. other browsers.

Some parts of this can be tricky to override, which is why I posted my method for overriding the option:selected part. I needed it for making a custom-styled select tag. Example: https://codepen.io/townivan/pen/YzPmJyg

Not sure why you made a gist for it but I stumbled across it while searching for a fix with "forms.css" in the query. So it might be helpful for others in the same way. :D