[mv3] Use parameter name as url filter where possible

Related issue:
uBlockOrigin/uBOL-home#575

Author: gorhill

src/js/static-net-filtering.js

@@ -4732,19 +4732,20 @@ StaticNetFilteringEngine.prototype.dnrFromCompiled = function(op, context, ...ar
         }
         case 'removeparam': {
             rule.action.type = 'redirect';
-            if ( rule.__modifierValue === '|' ) {
-                rule.__modifierValue = '';
+            let paramName = rule.__modifierValue;
+            if ( paramName === '|' ) {
+                paramName = '';
             }
-            if ( rule.__modifierValue !== '' ) {
+            if ( paramName !== '' ) {
                 rule.action.redirect = {
                     transform: {
                         queryTransform: {
-                            removeParams: [ rule.__modifierValue ]
+                            removeParams: [ paramName ]
                         }
                     }
                 };
-                if ( /^~?\/.+\/$/.test(rule.__modifierValue) ) {
-                    dnrAddRuleError(rule, `Unsupported regex-based removeParam: ${rule.__modifierValue}`);
+                if ( /^~?\/.+\/$/.test(paramName) ) {
+                    dnrAddRuleError(rule, `Unsupported regex-based removeParam: ${paramName}`);
                 }
             } else {
                 rule.action.redirect = {
@@ -4766,15 +4767,13 @@ StaticNetFilteringEngine.prototype.dnrFromCompiled = function(op, context, ...ar
                     ];
                 }
             }
-            // https://github.com/uBlockOrigin/uBOL-home/issues/140
-            //   Mitigate until DNR API flaw is addressed by browser vendors
-            let priority = rule.priority || 1;
-            if ( rule.condition.urlFilter !== undefined ) { priority += 1; }
-            if ( rule.condition.regexFilter !== undefined ) { priority += 1; }
-            if ( rule.condition.initiatorDomains !== undefined ) { priority += 1; }
-            if ( rule.condition.requestDomains !== undefined ) { priority += 1; }
-            if ( priority !== 1 ) {
-                rule.priority = priority;
+            // https://github.com/uBlockOrigin/uBOL-home/discussions/575
+            if ( rule.condition.urlFilter === undefined ) {
+                if ( rule.condition.regexFilter === undefined ) {
+                    if ( paramName !== '' ) {
+                        rule.condition.urlFilter = `^${paramName}=`;
+                    }
+                }
             }
             if ( rule.__modifierAction === ALLOW_REALM ) {
                 dnrAddRuleError(rule, `Unsupported removeparam exception: ${rule.__modifierValue}`);