diff --git a/src/core/components/operations.jsx b/src/core/components/operations.jsx
index 505217ff..b50e2afb 100644
--- a/src/core/components/operations.jsx
+++ b/src/core/components/operations.jsx
@@ -48,7 +48,7 @@ export default class Operations extends React.Component {
     let filter = layoutSelectors.currentFilter()
 
     if (filter) {
-      if (filter !== true) {
+      if (filter !== true && filter !== "true" && filter !== "false") {
         taggedOps = fn.opsFilter(taggedOps, filter)
       }
     }
diff --git a/src/core/containers/filter.jsx b/src/core/containers/filter.jsx
index 24a668ca..872297f0 100644
--- a/src/core/containers/filter.jsx
+++ b/src/core/containers/filter.jsx
@@ -29,7 +29,7 @@ export default class FilterContainer extends React.Component {
 
     return (
       <div>
-        {filter === null || filter === false ? null :
+        {filter === null || filter === false || filter === "false" ? null :
           <div className="filter-container">
             <Col className="filter wrapper" mobile={12}>
               <input className={classNames.join(" ")} placeholder="Filter by tag" type="text"
diff --git a/test/e2e-cypress/tests/bugs/6276.js b/test/e2e-cypress/tests/bugs/6276.js
new file mode 100644
index 00000000..e26dbd72
--- /dev/null
+++ b/test/e2e-cypress/tests/bugs/6276.js
@@ -0,0 +1,43 @@
+describe("#6276: Query parameter filter=true is filtering by the value 'true'", () => {
+  describe("With filter=true", () => {
+    it("should display the filter bar", () => {
+      cy.visit("/?url=/documents/petstore.swagger.yaml&filter=true")
+        .get(".operation-filter-input")
+        .should("exist")
+        .should("be.empty")
+        .get(".opblock-tag[data-tag='pet']")
+        .should("exist")
+        .get(".opblock-tag[data-tag='store']")
+        .should("exist")
+        .get(".opblock-tag[data-tag='user']")
+        .should("exist")
+    })
+  })
+  describe("With filter=false", () => {
+    it("should not display the filter bar", () => {
+      cy.visit("/?url=/documents/petstore.swagger.yaml&filter=false")
+        .get(".operation-filter-input")
+        .should("not.exist")
+        .get(".opblock-tag[data-tag='pet']")
+        .should("exist")
+        .get(".opblock-tag[data-tag='store']")
+        .should("exist")
+        .get(".opblock-tag[data-tag='user']")
+        .should("exist")
+    })
+  })
+  describe("With filter=pet", () => {
+    it("should display the filter bar and only show the operations tagged with pet", () => {
+      cy.visit("/?url=/documents/petstore.swagger.yaml&filter=pet")
+        .get(".operation-filter-input")
+        .should("exist")
+        .should("have.value", "pet")
+        .get(".opblock-tag[data-tag='pet']")
+        .should("exist")
+        .get(".opblock-tag[data-tag='store']")
+        .should("not.exist")
+        .get(".opblock-tag[data-tag='user']")
+        .should("not.exist")
+    })
+  })
+})