diff --git a/devtools/client/inspector/rules/test/browser_rules_edit-property-increments.js b/devtools/client/inspector/rules/test/browser_rules_edit-property-increments.js
index 050c132f68c6..2c88ef02a92c 100644
--- a/devtools/client/inspector/rules/test/browser_rules_edit-property-increments.js
+++ b/devtools/client/inspector/rules/test/browser_rules_edit-property-increments.js
@@ -20,7 +20,6 @@ const TEST_URI = `
       background: none;
       transition: initial;
       z-index: 0;
-      opacity: 1;
     }
   </style>
   <div id="test"></div>
@@ -40,7 +39,6 @@ add_task(function* () {
   yield testShorthandIncrements(view);
   yield testOddCases(view);
   yield testZeroValueIncrements(view);
-  yield testOpacityIncrements(view);
 });
 
 function* testMarginIncrements(view) {
@@ -229,27 +227,6 @@ function* testZeroValueIncrements(view) {
   });
 }
 
-function* testOpacityIncrements(view) {
-  info("Testing keyboard increments on the opacity property");
-
-  let idRuleEditor = getRuleViewRuleEditor(view, 1);
-  let opacityPropEditor = idRuleEditor.rule.textProps[7].editor;
-
-  yield runIncrementTest(opacityPropEditor, view, {
-    1: {alt: true, start: "0.5", end: "0.51", selectAll: true},
-    2: {start: "0", end: "0.1", selectAll: true},
-    3: {shift: true, start: "0", end: "1", selectAll: true},
-    4: {down: true, alt: true, start: "0.1", end: "0.09", selectAll: true},
-    5: {down: true, start: "0", end: "-0.1", selectAll: true},
-    6: {down: true, shift: true, start: "0", end: "-1", selectAll: true},
-    7: {pageUp: true, shift: true, start: "0", end: "10", selectAll: true},
-    8: {pageDown: true, shift: true, start: "0", end: "-10",
-        selectAll: true},
-    9: {start: "0.7", end: "0.8", selectAll: true},
-    10: {down: true, start: "0", end: "-0.1", selectAll: true},
-  });
-}
-
 function* runIncrementTest(propertyEditor, view, tests) {
   let editor = yield focusEditableField(view, propertyEditor.valueSpan);
 
diff --git a/devtools/client/inspector/rules/views/text-property-editor.js b/devtools/client/inspector/rules/views/text-property-editor.js
index 008f50721cfa..219e67bac68d 100644
--- a/devtools/client/inspector/rules/views/text-property-editor.js
+++ b/devtools/client/inspector/rules/views/text-property-editor.js
@@ -295,7 +295,6 @@ TextPropertyEditor.prototype = {
         advanceChars: advanceValidate,
         contentType: InplaceEditor.CONTENT_TYPES.CSS_VALUE,
         property: this.prop,
-        defaultIncrement: this.prop.name === "opacity" ? 0.1 : 1,
         popup: this.popup,
         multiline: true,
         maxWidth: () => this.container.getBoundingClientRect().width,
diff --git a/devtools/client/shared/inplace-editor.js b/devtools/client/shared/inplace-editor.js
index 4ea354ae9a21..aaa175252d0d 100644
--- a/devtools/client/shared/inplace-editor.js
+++ b/devtools/client/shared/inplace-editor.js
@@ -122,8 +122,6 @@ function isKeyIn(key, ...keys) {
  *              from `element` to the new input.
  *      defaults to false
  *    {Object} cssProperties: An instance of CSSProperties.
- *    {Number} defaultIncrement: The value by which the input is incremented
- *      or decremented by default (0.1 for properties like opacity and 1 by default)
  */
 function editableField(options) {
   return editableItem(options, function (element, event) {
@@ -227,7 +225,6 @@ function InplaceEditor(options, event) {
   this.change = options.change;
   this.done = options.done;
   this.contextMenu = options.contextMenu;
-  this.defaultIncrement = options.defaultIncrement || 1;
   this.destroy = options.destroy;
   this.initial = options.initial ? options.initial : this.elt.textContent;
   this.multiline = options.multiline || false;
@@ -1212,9 +1209,9 @@ InplaceEditor.prototype = {
     let key = event.keyCode;
 
     if (isKeyIn(key, "UP", "PAGE_UP")) {
-      increment = 1 * this.defaultIncrement;
+      increment = 1;
     } else if (isKeyIn(key, "DOWN", "PAGE_DOWN")) {
-      increment = -1 * this.defaultIncrement;
+      increment = -1;
     }
 
     if (event.shiftKey && !event.altKey) {