diff --git a/gfx/gl/GLContext.cpp b/gfx/gl/GLContext.cpp
index 68b9905c9df7..b790c118a832 100644
--- a/gfx/gl/GLContext.cpp
+++ b/gfx/gl/GLContext.cpp
@@ -95,7 +95,6 @@ static const char *sExtensionNames[] = {
     "GL_ARB_texture_float",
     "GL_ARB_texture_non_power_of_two",
     "GL_ARB_texture_rectangle",
-    "GL_ARB_texture_storage",
     "GL_ARB_transform_feedback2",
     "GL_ARB_uniform_buffer_object",
     "GL_ARB_vertex_array_object",
@@ -125,7 +124,6 @@ static const char *sExtensionNames[] = {
     "GL_EXT_texture_filter_anisotropic",
     "GL_EXT_texture_format_BGRA8888",
     "GL_EXT_texture_sRGB",
-    "GL_EXT_texture_storage",
     "GL_EXT_transform_feedback",
     "GL_EXT_unpack_subimage",
     "GL_IMG_read_format",
@@ -932,29 +930,6 @@ GLContext::InitWithPrefix(const char *prefix, bool trygl)
             }
         }
 
-        if (IsSupported(GLFeature::texture_storage)) {
-            SymLoadStruct coreSymbols[] = {
-                { (PRFuncPtr*) &mSymbols.fTexStorage2D, { "TexStorage2D", nullptr } },
-                { (PRFuncPtr*) &mSymbols.fTexStorage3D, { "TexStorage3D", nullptr } },
-                END_SYMBOLS
-            };
-
-            SymLoadStruct extSymbols[] = {
-                { (PRFuncPtr*) &mSymbols.fTexStorage2D, { "TexStorage2DEXT", nullptr } },
-                { (PRFuncPtr*) &mSymbols.fTexStorage3D, { "TexStorage3DEXT", nullptr } },
-                END_SYMBOLS
-            };
-
-            bool useCore = IsFeatureProvidedByCoreSymbols(GLFeature::texture_storage);
-            if (!LoadSymbols(useCore ? coreSymbols : extSymbols, trygl, prefix)) {
-                NS_ERROR("GL supports texture storage without supplying its functions.");
-
-                MarkUnsupported(GLFeature::texture_storage);
-                MarkExtensionSupported(useCore ? ARB_texture_storage : EXT_texture_storage);
-                ClearSymbols(coreSymbols);
-            }
-        }
-
         // ARB_transform_feedback2/NV_transform_feedback2 is a
         // superset of EXT_transform_feedback/NV_transform_feedback
         // and adds glPauseTransformFeedback &
diff --git a/gfx/gl/GLContext.h b/gfx/gl/GLContext.h
index 4bcce7021a62..cb9ffdb71dbc 100644
--- a/gfx/gl/GLContext.h
+++ b/gfx/gl/GLContext.h
@@ -118,7 +118,6 @@ MOZ_BEGIN_ENUM_CLASS(GLFeature)
     texture_half_float,
     texture_half_float_linear,
     texture_non_power_of_two,
-    texture_storage,
     transform_feedback2,
     uniform_buffer_object,
     uniform_matrix_nonsquare,
@@ -375,7 +374,6 @@ public:
         ARB_texture_float,
         ARB_texture_non_power_of_two,
         ARB_texture_rectangle,
-        ARB_texture_storage,
         ARB_transform_feedback2,
         ARB_uniform_buffer_object,
         ARB_vertex_array_object,
@@ -405,7 +403,6 @@ public:
         EXT_texture_filter_anisotropic,
         EXT_texture_format_BGRA8888,
         EXT_texture_sRGB,
-        EXT_texture_storage,
         EXT_transform_feedback,
         EXT_unpack_subimage,
         IMG_read_format,
@@ -3069,23 +3066,6 @@ public:
         AFTER_GL_CALL;
     }
 
-// -----------------------------------------------------------------------------
-// Core GL 4.2, GL ES 3.0 & Extension ARB_texture_storage/EXT_texture_storage
-    void fTexStorage2D(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height)
-    {
-        BEFORE_GL_CALL;
-        ASSERT_SYMBOL_PRESENT(fTexStorage2D);
-        mSymbols.fTexStorage2D(target, levels, internalformat, width, height);
-        AFTER_GL_CALL;
-    }
-
-    void fTexStorage3D(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth)
-    {
-        BEFORE_GL_CALL;
-        ASSERT_SYMBOL_PRESENT(fTexStorage3D);
-        mSymbols.fTexStorage3D(target, levels, internalformat, width, height, depth);
-        AFTER_GL_CALL;
-    }
 
 // -----------------------------------------------------------------------------
 // 3D Textures
diff --git a/gfx/gl/GLContextFeatures.cpp b/gfx/gl/GLContextFeatures.cpp
index f18b0946f324..2ea198a50ae7 100644
--- a/gfx/gl/GLContextFeatures.cpp
+++ b/gfx/gl/GLContextFeatures.cpp
@@ -508,16 +508,6 @@ static const FeatureInfo sFeatureInfoArr[] = {
             GLContext::Extensions_End
         }
     },
-    {
-        "texture_storage",
-        420, // OpenGL version
-        300, // OpenGL ES version
-        GLContext::ARB_texture_storage,
-        {
-            GLContext::EXT_texture_storage,
-            GLContext::Extensions_End
-        }
-    },
     {
         "transform_feedback2",
         400, // OpenGL version
diff --git a/gfx/gl/GLContextSymbols.h b/gfx/gl/GLContextSymbols.h
index cf838f263c10..591abf1afc79 100644
--- a/gfx/gl/GLContextSymbols.h
+++ b/gfx/gl/GLContextSymbols.h
@@ -580,12 +580,6 @@ struct GLContextSymbols
     typedef void (GLAPIENTRY * PFNGLGETSAMPLERPARAMETERFVPROC) (GLuint sampler, GLenum pname, GLfloat *params);
     PFNGLGETSAMPLERPARAMETERFVPROC fGetSamplerParameterfv;
 
-    // texture_storage
-    typedef void (GLAPIENTRY * PFNGLTEXSTORAGE2DPROC) (GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height);
-    PFNGLTEXSTORAGE2DPROC fTexStorage2D;
-    typedef void (GLAPIENTRY * PFNGLTEXSTORAGE3DPROC) (GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth);
-    PFNGLTEXSTORAGE3DPROC fTexStorage3D;
-
     // uniform_buffer_object
     typedef void (GLAPIENTRY * PFNGLGETUNIFORMINDICESPROC) (GLuint program, GLsizei uniformCount,
                                                             const GLchar* const* uniformNames, GLuint* uniformIndices);