diff --git a/files/en-us/learn_web_development/getting_started/environment_setup/browsing_the_web/index.md b/files/en-us/learn_web_development/getting_started/environment_setup/browsing_the_web/index.md
index 1fdaab3cdeafaf4..0fb988764df3d2f 100644
--- a/files/en-us/learn_web_development/getting_started/environment_setup/browsing_the_web/index.md
+++ b/files/en-us/learn_web_development/getting_started/environment_setup/browsing_the_web/index.md
@@ -152,7 +152,7 @@ For now, try opening a web browser and loading up a couple of your favorite site
 
 As a web developer, you will spend a lot of time searching for information, from syntax you can't remember to solutions to specific problems. It is therefore a good idea to learn how to effectively search the web.
 
-If you are looking for general information about a specific web technology feature, you should type the name of the feature into the MDN search box. For example, try typing `box model`, `fetch()` or `video element` into the the search box and see what comes up. If you don't find the information you need, try expanding your search — try your search term in a search engine.
+If you are looking for general information about a specific web technology feature, you should type the name of the feature into the MDN search box. For example, try typing `box model`, `fetch()` or `video element` into the search box and see what comes up. If you don't find the information you need, try expanding your search — try your search term in a search engine.
 
 If you are looking for a solution to a specific problem, such as `how to print out the fibonacci sequence with JavaScript` or `how to calculate whether a number is a prime number with JavaScript`, it is a good idea to search on a website such as [StackOverflow](https://stackoverflow.com), which is a community dedicated to answering programming problems. Again, try using a general search engine if a specific site doesn't give you a helpful answer.
 
diff --git a/files/en-us/mozilla/firefox/releases/130/index.md b/files/en-us/mozilla/firefox/releases/130/index.md
index ea0b860d2be5395..0ba347f2afe7810 100644
--- a/files/en-us/mozilla/firefox/releases/130/index.md
+++ b/files/en-us/mozilla/firefox/releases/130/index.md
@@ -18,7 +18,7 @@ This article provides information about the changes in Firefox 130 that affect d
 ### CSS
 
 - The [`hyphens`](/en-US/docs/Web/CSS/hyphens) CSS property is now properly supported for Czech and Slovak languages.
-  Among other things, this ensures that words will will no longer split on syllables ([Firefox bug 1908931](https://bugzil.la/1908931)).
+  Among other things, this ensures that words will no longer split on syllables ([Firefox bug 1908931](https://bugzil.la/1908931)).
 
 ### APIs
 
@@ -60,7 +60,7 @@ These features are newly shipped in Firefox 130 but are disabled by default. To
 - **Request video frame callback:** `media.rvfc.enabled`.
 
   The {{domxref('HTMLVideoElement/requestVideoFrameCallback','requestVideoFrameCallback()')}} method of the {{domxref('HTMLVideoElement')}} interface registers a callback function that runs when a new video frame is sent to the compositor. This enables developers to perform efficient operations on each video frame, such as video analysis, painting to a canvas, synchronization with external audio sources, and so on. The method returns a callback handle that can be passed to {{domxref('HTMLVideoElement.cancelVideoFrameCallback()')}} in order to cancel the outstanding callback request.
-  Both methods are are enabled by default on the nightly build. ([Firefox bug 1800882](https://bugzil.la/1800882)).
+  Both methods are enabled by default on the nightly build. ([Firefox bug 1800882](https://bugzil.la/1800882)).
 
 - **CSP violation reports using the Reporting API:** `dom.reporting.enabled`.
 
diff --git a/files/en-us/web/api/htmlelement/beforetoggle_event/index.md b/files/en-us/web/api/htmlelement/beforetoggle_event/index.md
index 901ba9272c5a9f5..607b1585bdc49a5 100644
--- a/files/en-us/web/api/htmlelement/beforetoggle_event/index.md
+++ b/files/en-us/web/api/htmlelement/beforetoggle_event/index.md
@@ -18,7 +18,7 @@ Among other things, this event can be used to:
 
 - prevent an element from being shown.
 - add or remove classes or properties from the element or associated elements, for example to control the animation behaviour of a dialog as it is opened and closed.
-- clear the state of the element before before it is opened or after it is hidden, for example to reset a dialog form and return value to an empty state, or hide any nested manual popovers when reopening a popup.
+- clear the state of the element before it is opened or after it is hidden, for example to reset a dialog form and return value to an empty state, or hide any nested manual popovers when reopening a popup.
 
 ## Syntax
 
diff --git a/files/en-us/web/api/htmlelement/focus/index.md b/files/en-us/web/api/htmlelement/focus/index.md
index eab5c19079701c1..37eb390650b8305 100644
--- a/files/en-us/web/api/htmlelement/focus/index.md
+++ b/files/en-us/web/api/htmlelement/focus/index.md
@@ -78,7 +78,7 @@ This example demonstrates how you can set the focus on a button element.
 
 First we define three buttons.
 Both the middle and right button will set focus on the left-most button.
-The right right-most button will also specify `focusVisible`.
+The right-most button will also specify `focusVisible`.
 
 ```html
 <button id="myButton">Button</button>
diff --git a/files/en-us/web/api/htmltextareaelement/selectionstart/index.md b/files/en-us/web/api/htmltextareaelement/selectionstart/index.md
index 0f0870a3e581fd2..8907ffb6b7b5918 100644
--- a/files/en-us/web/api/htmltextareaelement/selectionstart/index.md
+++ b/files/en-us/web/api/htmltextareaelement/selectionstart/index.md
@@ -12,7 +12,7 @@ The **`selectionStart`** property of the {{domxref("HTMLTextAreaElement")}} inte
 
 When nothing is selected, the value of both the `selectionStart` and {{domxref("HTMLTextAreaElement.selectionEnd", "selectionEnd")}} is the position of the cursor (caret) inside the `<textarea>` element.
 
-Setting `selectionStart` to a value greater then the current value of {{domxref("HTMLTextAreaElement.selectionEnd", "selectionEnd")}} updates both the the `selectionStart` and `selectionEnd` properties to that value. If that value is equal to or greater than the {{domxref("HTMLTextAreaElement.textLength", "textLength")}}, both properties are both set to the `textLength` property value.
+Setting `selectionStart` to a value greater then the current value of {{domxref("HTMLTextAreaElement.selectionEnd", "selectionEnd")}} updates both the `selectionStart` and `selectionEnd` properties to that value. If that value is equal to or greater than the {{domxref("HTMLTextAreaElement.textLength", "textLength")}}, both properties are both set to the `textLength` property value.
 
 The property value can be retrieved and set without the `<textarea>` having focus, but the element does need to have focus for the {{cssxref("::selection")}} pseudo-element to match the selected text.
 
diff --git a/files/en-us/web/api/svgrect/height/index.md b/files/en-us/web/api/svgrect/height/index.md
index 1594ae2991672d8..2e6658e301234d6 100644
--- a/files/en-us/web/api/svgrect/height/index.md
+++ b/files/en-us/web/api/svgrect/height/index.md
@@ -10,7 +10,7 @@ browser-compat: api.SVGRect.height
 
 The **`height`** property of the {{domxref("SVGRect")}} interface is an alias for the {{DOMXref("DOMRect.height")}} property. It describes the vertical size of the element. It reflects the SVG element's {{SVGattr("height")}} attribute and the CSS {{cssxref("height")}} property.
 
-The height is a length; it is the distance from the top of element to the bottom of the element in the the user coordinate system. Its syntax is the same as that for [`<length>`](/en-US/docs/Web/SVG/Content_type#length).
+The height is a length; it is the distance from the top of element to the bottom of the element in the user coordinate system. Its syntax is the same as that for [`<length>`](/en-US/docs/Web/SVG/Content_type#length).
 
 ## Usage context
 
diff --git a/files/en-us/web/api/svgrect/width/index.md b/files/en-us/web/api/svgrect/width/index.md
index 273dc53f8e395b1..5d28d55f408cec5 100644
--- a/files/en-us/web/api/svgrect/width/index.md
+++ b/files/en-us/web/api/svgrect/width/index.md
@@ -10,7 +10,7 @@ browser-compat: api.SVGRect.width
 
 The **`width`** property of the {{domxref("SVGRect")}} interface is an alias for the {{DOMXref("DOMRect.width")}} property. It describes the horizontal size of the element. It reflects the SVG element's {{SVGattr("width")}} attribute and the CSS {{cssxref("width")}} property.
 
-The width is a length; it is the distance from the left of element to the right of the element in the the user coordinate system. Its syntax is the same as that for [`<length>`](/en-US/docs/Web/SVG/Content_type#length).
+The width is a length; it is the distance from the left of element to the right of the element in the user coordinate system. Its syntax is the same as that for [`<length>`](/en-US/docs/Web/SVG/Content_type#length).
 
 ## Usage context
 
diff --git a/files/en-us/web/css/@font-face/font-weight/index.md b/files/en-us/web/css/@font-face/font-weight/index.md
index 2af4d30e008c818..897496fc0020a7b 100644
--- a/files/en-us/web/css/@font-face/font-weight/index.md
+++ b/files/en-us/web/css/@font-face/font-weight/index.md
@@ -161,7 +161,7 @@ The other three declarations use the light, bold, and extra-bold versions of the
 - the bold font is associated with the range 500-700
 - the extra-bold font is associated with the range 700-1000
 
-The CSS [cascade](/en-US/docs/Web/CSS/Cascade) ensures that the three latter declarations override parts of the the range that was set in the `FiraSans-Regular` declaration.
+The CSS [cascade](/en-US/docs/Web/CSS/Cascade) ensures that the three latter declarations override parts of the range that was set in the `FiraSans-Regular` declaration.
 
 ```css
 @font-face {
@@ -234,7 +234,7 @@ We include a variable font, ["League Mono"](https://www.theleagueofmoveabletype.
 
 #### HTML
 
-We include a paragraph with `<output>` initially set to `400`, as that is the the default font-weight for unstyled paragraph text. This paragraph is nestled between two other paragraphs, so you can compare rendered versus declared font weight values.
+We include a paragraph with `<output>` initially set to `400`, as that is the default font-weight for unstyled paragraph text. This paragraph is nestled between two other paragraphs, so you can compare rendered versus declared font weight values.
 
 We include an {{htmlelement("input/range")}} of type `range`, nested in a {{htmlelement("label")}}, setting the `step` to `50`.
 
diff --git a/files/en-us/web/css/css_grid_layout/grid_layout_using_line-based_placement/index.md b/files/en-us/web/css/css_grid_layout/grid_layout_using_line-based_placement/index.md
index 1afb77edda46b18..4e2b69dbdadaab3 100644
--- a/files/en-us/web/css/css_grid_layout/grid_layout_using_line-based_placement/index.md
+++ b/files/en-us/web/css/css_grid_layout/grid_layout_using_line-based_placement/index.md
@@ -390,7 +390,7 @@ When we specify our grid area using the `grid-area` property we first define bot
 
 We can also count backwards from the block and inline ends of the grid, for English that would be the right-hand column line and final row line. The last lines of the explicit grid can be addressed as `-1`, and you can count back from there – so the second to last line is `-2`.
 
-Do note that negative values are relevant only to the explicit grid. The final line is the final line of the the grid defined by `grid-template-columns` and `grid-template-rows`, and does not take into account any rows or columns added in the _implicit grid_ outside of that.
+Do note that negative values are relevant only to the explicit grid. The final line is the final line of the grid defined by `grid-template-columns` and `grid-template-rows`, and does not take into account any rows or columns added in the _implicit grid_ outside of that.
 
 In this next example, we have flipped the layout we were working with by working from the right and bottom of our grid when placing the items.
 
diff --git a/files/en-us/web/css/easing-function/index.md b/files/en-us/web/css/easing-function/index.md
index 04331f1cdf43fe1..4e1c2cb5667c93d 100644
--- a/files/en-us/web/css/easing-function/index.md
+++ b/files/en-us/web/css/easing-function/index.md
@@ -112,7 +112,7 @@ An `<easing-function>` can be one of the following types:
         ![Two graphs of Input progress to Output progress. In the step-start graph, an unfilled circle represents the origin point (0, 0), with a horizontal line extending from (0, 1) to (1, 1). In the step-end graph, a horizontal line extends from the origin to (1, 0), with an unfilled circle at (1,0) and a solid circle at (1, 1).](step.svg)
 
     - {{cssxref("easing-function/steps", "steps()")}}
-      - : Creates a stair-shaped curve using an {{cssxref("&lt;integer&gt;")}} to specify the number of intervals and an optional optional keyword to control the timing of jumps.
+      - : Creates a stair-shaped curve using an {{cssxref("&lt;integer&gt;")}} to specify the number of intervals and an optional keyword to control the timing of jumps.
 
 ## Formal syntax
 
diff --git a/files/en-us/web/html/global_attributes/autocorrect/index.md b/files/en-us/web/html/global_attributes/autocorrect/index.md
index 0c1a7e86ab774d3..68d6f710b2d2c24 100644
--- a/files/en-us/web/html/global_attributes/autocorrect/index.md
+++ b/files/en-us/web/html/global_attributes/autocorrect/index.md
@@ -39,7 +39,7 @@ The {{htmlelement("input")}} element types that don't support auto-correction al
 For all other editable elements, setting any other value than those listed above is always treated as `on`.
 The default value for elements that are not nested inside a `<form>` is `on`.
 
-When nested in a `<form>`, the following elements inherit their their default value of `autocorrect` from the form if it has been set: {{htmlelement("button")}}, {{htmlelement("fieldset")}}, {{htmlelement("input")}}, {{htmlelement("output")}}, {{htmlelement("select")}}, and {{htmlelement("textarea")}}.
+When nested in a `<form>`, the following elements inherit their default value of `autocorrect` from the form if it has been set: {{htmlelement("button")}}, {{htmlelement("fieldset")}}, {{htmlelement("input")}}, {{htmlelement("output")}}, {{htmlelement("select")}}, and {{htmlelement("textarea")}}.
 
 ## Examples
 
diff --git a/files/en-us/web/http/headers/index.md b/files/en-us/web/http/headers/index.md
index 27e0e8c9af1efc5..dc155fb8e39ce5a 100644
--- a/files/en-us/web/http/headers/index.md
+++ b/files/en-us/web/http/headers/index.md
@@ -298,7 +298,7 @@ Headers used by the [WebSockets API](/en-US/docs/Web/API/WebSockets_API) in the
   - : Request header containing a key that verifies that the client explicitly intends to open a `WebSocket`.
 - {{HTTPHeader("Sec-WebSocket-Protocol")}}
   - : In requests, this header indicates the sub-protocols supported by the client in preferred order.
-    In responses, it indicates the the sub-protocol selected by the server from the client's preferences.
+    In responses, it indicates the sub-protocol selected by the server from the client's preferences.
 - {{HTTPHeader("Sec-WebSocket-Version")}}
   - : In requests, this header indicates the version of the WebSocket protocol used by the client.
     In responses, it is sent only if the requested protocol version is not supported by the server, and lists the versions that the server supports.
diff --git a/files/en-us/web/javascript/reference/global_objects/temporal/zoneddatetime/index.md b/files/en-us/web/javascript/reference/global_objects/temporal/zoneddatetime/index.md
index bef02e9a430b95d..8f3d059e924b96c 100644
--- a/files/en-us/web/javascript/reference/global_objects/temporal/zoneddatetime/index.md
+++ b/files/en-us/web/javascript/reference/global_objects/temporal/zoneddatetime/index.md
@@ -68,7 +68,7 @@ The IANA time zone database changes from time to time, usually to add new time z
 | `Asia/Ho_Chi_Minh`               | `Asia/Saigon`                   |
 | `Europe/Kyiv`                    | `Europe/Kiev`                   |
 
-Historically, these renames caused problems for programmers because the the Unicode [CLDR database](https://github.com/unicode-org/cldr-json/blob/main/cldr-json/cldr-bcp47/bcp47/timezone.json) (a library used by browsers rely on to supply time zone identifiers and data) did not follow IANA's renaming for [stability reasons](https://unicode.org/reports/tr35/#Time_Zone_Identifiers). As a result, some browsers like Chrome and Safari reported CLDR's outdated identifiers, while other browsers like Firefox overrode CLDR's defaults and reported the up-to-date primary identifiers.
+Historically, these renames caused problems for programmers because the Unicode [CLDR database](https://github.com/unicode-org/cldr-json/blob/main/cldr-json/cldr-bcp47/bcp47/timezone.json) (a library used by browsers rely on to supply time zone identifiers and data) did not follow IANA's renaming for [stability reasons](https://unicode.org/reports/tr35/#Time_Zone_Identifiers). As a result, some browsers like Chrome and Safari reported CLDR's outdated identifiers, while other browsers like Firefox overrode CLDR's defaults and reported the up-to-date primary identifiers.
 
 With the introduction of Temporal, this behavior is now more standardized: